JP4225069B2 - Sensor assembly, sealing device and rolling bearing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sensor assembly, a seal device, and a rolling bearing device.
[0002]
[Prior art]
Some rolling bearings incorporate a rotation detector (see Patent Document 1). The rotation detector includes a Hall element and an encoder element. The hall element is attached to a seal ring attached to the outer ring of the rolling bearing. The encoder element is attached to the inner ring of the rolling bearing. In this rotation detector, the Hall element detects an encoder element integrated with the inner ring and outputs a predetermined electrical signal. The electric signal output from the hall element is processed by the signal processing circuit to recognize the rotation state of the inner ring.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-197938
[Problems to be solved by the invention]
In the above conventional example, since the Hall element is attached to the seal ring, when the Hall element breaks down, it is necessary to remove and replace the seal ring together, but this seal ring is against the inner peripheral surface of the shoulder of the outer ring. Since it is fitted with interference, it is difficult to remove.
[0005]
[Means for Solving the Problems]
A sensor assembly according to the present invention is a sensor assembly that is fixed to an outer ring member that is a fixed ring and detects a rotation state of an inner ring member that is a rotating ring. The sensor assembly includes a metal ring and an outer peripheral surface of the inner ring member A magnetic sensor that detects a magnetic ring to be fixed; and a resin exterior body that covers the outside of the magnetic sensor and is integrated with the metal annular body, wherein the resin exterior body is formed of the outer ring member. It is press-fitted to the inner periphery, and is used when the sensor assembly is removed from the outer ring member at four circumferentially spaced locations that are circumferentially spaced from the magnetic sensor installation location of the resin exterior body. A hooking portion on which the removal jig is hooked is provided.
[0006]
In this case, when removing the sensor assembly from the outer ring member, the removal jig can be hooked on the hook portion provided on the resin exterior body of the sensor assembly. For this reason, the sensor assembly can be easily removed with the removal jig.
[0007]
The seal device of the present invention is a configuration in which an outer ring side seal ring fixed to an outer ring member serving as a fixed ring and an inner ring side seal ring fixed to an inner ring member serving as a rotating ring are combined. A magnetic sensor is integrated on the outer circumference of the inner ring side through a resin outer casing, a magnetic ring is fixed to the inner ring side seal ring, and the magnetic ring is detected by the magnetic sensor to detect the rotation state of the inner ring member. The resin outer body is press-fitted to the inner circumference of the outer ring member, and the circumference of the resin outer body is circumferentially separated from the installation location of the magnetic sensor. At four equally spaced locations, there are provided hooks on which a removal jig used when removing the outer ring side seal ring from the outer ring member is hooked.
[0008]
This seal device has a structure in which a rotation detector composed of a magnetic ring and a magnetic sensor is integrated, and a removal jig is used to remove the outer ring side seal ring integrated with the magnetic sensor from the outer ring member. And easy to do.
[0009]
The rolling bearing device according to the present invention includes an inner ring member serving as a rotating ring having a road surface, an outer ring member serving as a fixed ring having a raceway surface concentrically disposed on the outer periphery of the inner ring member and corresponding to the inner ring member, A rolling bearing device comprising a rolling element interposed between raceway surfaces of an inner ring member and the outer ring member, and a seal device that seals a gap between the inner ring member and the outer ring member, The outer ring side seal ring fixed to the outer ring member and the inner ring side seal ring fixed to the inner ring member are combined, and a magnetic sensor is disposed on the outer periphery of the outer ring side seal ring via a resin outer package. And a magnetic ring is fixed to the inner ring side seal ring, the magnetic ring is detected by the magnetic sensor to detect the rotation state of the inner ring member, Serial resin sheathing body, said is what is press-fitted into the inner periphery of the outer ring member, the outer ring in a circumferential equidistant four positions spaced circumferentially from the installation position of the magnetic sensor of the resin sheathing body A hooking portion is provided on which a removal jig used when removing the outer ring side seal ring from the member is hooked.
[0010]
This rolling bearing device incorporates a rotation detector comprising a magnetic ring and a magnetic sensor integrally with the seal device, and is removed when the outer ring seal ring integrated with the magnetic sensor is removed from the outer ring member. It can be done easily using a jig.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
1 to 7 show an embodiment of the present invention. The rolling bearing device 1 of this embodiment is used on the drive wheel side of an automobile. In FIG. 1, the left side of the rolling bearing device 1 is the vehicle outer side, and the right side is the vehicle inner side.
[0012]
Two rows of balls (an example of rolling elements) 4, 5 arranged on the outer ring member 2 that is non-rotatably supported on the vehicle body side via a knuckle 9 are arranged at circumferentially equidistant positions by the crown-shaped cage 6. Thus, the inner ring member 3 is supported so as to be rotatable around the axis.
[0013]
A support flange 21 that protrudes radially outward is formed on the outer peripheral surface of the outer ring member 2. The support ring 21 is fixed to the knuckle 9 via the mounting bolt 10 so that the outer ring member 2 is supported in a non-rotating manner.
[0014]
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.
[0015]
In the center hole of the hub wheel 31, a shaft portion 13 formed integrally with the saddle-shaped outer ring member 12 of a constant velocity joint (CVJ) is spline-fitted. A nut 14 is screwed onto the vehicle outer side end of the shaft 13, and the nut 14 is tightened against the end surface of the recess 33 of the hub wheel 31, so that a necessary preload is applied to the balls 4, 5 in both rows. At the same time, the saddle-shaped outer ring member 12 is incorporated into the inner ring member 3 in a rotationally integrated manner.
[0016]
A hub flange 34 projecting radially outward is integrally formed on the outer peripheral surface of the hub wheel 31 on the vehicle outer side. A brake disc rotor and wheels are attached to the hub flange 34.
[0017]
Sealing devices 7 and 8 are attached to both sides in the axial direction between the outer ring member 2 and the inner ring member 3. These sealing devices 7 and 8 prevent the lubricant in the annular bearing space 11 from leaking to the outside, and prevent external muddy water and the like from entering the annular bearing space 11.
[0018]
The sealing device 7 on the vehicle outer side has a configuration in which a rubber lip that is in sliding contact with the hub wheel 31 is bonded to an annular cored bar fitted inside the outer ring member 2.
[0019]
As shown in FIG. 3, the vehicle inner side sealing device 8 has a configuration in which an outer ring side seal ring 81 and an inner ring side seal ring 82 are combined, and is called a so-called pack seal.
[0020]
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. 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.
[0021]
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.
[0022]
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.
[0023]
In this embodiment, the rotation state (rotation phase, rotation speed, rotation speed, rotation direction, etc.) of the inner ring member 3 (hub wheel 31 and cylindrical member 32) is detected with respect to the sealing device 8 on the vehicle inner side. A rotation detector is incorporated.
[0024]
The rotation detector includes a forward / reverse detection sensor 15 as a magnetic sensor and a pulsar ring 16 as a magnetic ring. The forward / reverse detection sensor 15 and the pulsar ring 16 are integrally attached to the outer ring side seal ring 81 and the inner ring side seal ring 82, respectively.
[0025]
Specifically, the forward / reverse detection sensor 15 is embedded in a resin outer casing 17 having a predetermined thickness that is laminated on the entire outer peripheral surface of the outer ring side seal ring 81. The assembly composed of the forward / reverse detection sensor 15, the resin exterior body 17, and the outer ring side seal ring 81 inserts the outer ring side seal ring 81 into the resin mold, and the outer diameter of the outer ring side seal ring 81. The forward / reverse detection sensor 15 is inserted in a floating state on the side, and the molten resin is injected into the mold. The resin exterior body 17 is made of engineering plastic such as polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyamide (PA), and the like. A female connector 20 to which a harness (not shown) connected to an electronic circuit of the vehicle body is connected at a predetermined circumferential position of the resin outer body 17 is integrally formed in a state of projecting radially outward. Is formed. A pin 19 is provided in the connector 20, and a forward / reverse detection sensor 15 is connected to the pin 19 via a signal line 18. Further, the resin exterior body 17 is provided with a flange 17a extending radially outward. The flange 17a is set to have an outer diameter that abuts against the end surface 2b of the outer ring member 2 on the vehicle inner side.
[0026]
The pulsar ring 16 is attached to the inner surface of the annular plate portion 86 b of the inner ring side seal ring 82. The pulsar ring 16 is formed by vulcanizing and molding rubber containing magnetic powder, and is magnetized, for example, in a form in which N poles and S poles are alternately arranged in the circumferential direction.
[0027]
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, so that the rotation direction can be detected in addition to the rotation angle. It has become. FIGS. 4A and 4B show the phase relationship between the detection signals of the two magnetic sensors. When one of the magnetic sensors outputs the rectangular wave signal of FIG. 4A, the other magnetic sensor has the rectangular wave of FIG. 4B that is 90 degrees out of phase with the rectangular wave signal of FIG. Output a signal. The two magnetic sensors are arranged to output such a rectangular wave signal. The rotational direction and rotational speed can be determined from the phase relationship between the rectangular wave signals of both magnetic sensors.
[0028]
The arrangement relationship between the forward / reverse detection sensor 15 and the pulsar ring 16 will be described with reference to FIG. That is, the arrangement interval of the two magnetic sensors 22 of the forward / reverse detection sensor 15 is set to an interval (λ / 4) at which the output phase is 90 degrees. Here, the magnetization pitch of the pulsar ring 16 is λ. The magnetization pitch is the total length of the circumferential magnetization length of N poles and the circumferential magnetization length of S poles adjacent thereto. 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.
[0029]
Next, a procedure for attaching the sealing device 8 on the vehicle inner side as described above will be described. While the outer ring side seal ring 81 and the inner ring side seal ring 82 are held together, the annular cored bar 86 of the inner ring side seal ring 82 is press-fitted into the shoulder portion 32a of the outer peripheral surface of the cylindrical member 32. The resin outer casing 17 of the outer ring side seal ring 81 is press-fitted into the shoulder portion 2 a on the inner peripheral surface of the outer ring member 2. At this time, the outer ring side seal ring 81 is positioned by bringing the flange 17a of the resin outer casing 17 of the outer ring side seal ring 81 into contact with the end surface 2b of the outer ring member 2 on the vehicle inner side. With the outer ring side seal ring 81 and the inner ring side seal ring 82 attached in this manner, the forward / reverse detection sensor 15 is positioned at a position where the change in the magnetic flux of the pulsar ring 16 can be detected.
[0030]
Further, in order to fix the rolling bearing device 1 to the knuckle 9 of the vehicle body, 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 attached to the knuckle 9 with a bolt 10. Fix it. The knuckle 9 is formed in a cylindrical shape except for the fixing portion to the support flange 21, but a notch 91 through which the connector 20 is inserted is formed on the outer side of the cylindrical portion. The connector 20 is inserted into the notch 91. After that, a harness (not shown) connected to the electronic circuit of the vehicle body is connected to the forward / reverse detection sensor 15. That is, although not shown, the harness is provided with a male connector that can be attached to and detached from the female connector 20 at the tip thereof, and the forward / reverse detection is performed by connecting the harness connector to the connector 20. A sensor 15 is connected to the electronic circuit of the vehicle body.
[0031]
Next, the rotation detection operation regarding the inner ring member 3 of the rolling bearing device 1 will be described.
[0032]
When the inner ring member 3 is rotated with respect to the outer ring member 2 fixed to the knuckle 9, the magnetic poles of the pulsar ring 16 that rotates integrally with the inner ring member 3 are converted into two pieces of forward / reverse detection sensors 15 as shown in FIG. The magnetic sensor 22 is sequentially opposed. At this time, when the facing state of the pulsar ring 16 with respect to the forward / reverse detection sensor 15 changes according to the rotational speed and direction of the pulsar ring 16, the rectangular wave from each magnetic sensor 22 of the forward / reverse detection sensor 15 corresponds to the change. The signal phase relationship and phase period change. Therefore, by performing signal processing on both the rectangular wave signals in the electronic circuit, the rotational phase, rotational speed, rotational speed, rotational direction, etc. of the inner ring member 3 can be obtained.
[0033]
In this embodiment, since the outer ring side seal ring 81 integrated with the forward / reverse detection sensor 15 is devised so that it can be easily removed using the removal jig 40 as shown in FIGS. To do.
[0034]
The detaching jig 40 includes a body 41, arms 42 and 42 fixed at positions facing the top and bottom 180 degrees of the body 41, and a screw shaft 43 that is screwed into the center of the body 41 in a penetrating state. The arm 42 includes a fixed link 42a that is fixed to the body 41, and a movable link 42b that is flexibly attached to the tip of the fixed link 42a via a joint portion. A claw 42c is provided at the tip of the movable link 42b. One end of the screw shaft 43 is integrally provided with a contact plate 43 a that abuts against the end surface of the hub wheel 31 on the vehicle inner side, and the other end of the screw shaft 43 is integrally provided with a rotation operation knob 43 b. Is provided.
[0035]
And the notch 17b is provided as a hook part where the nail | claw 42c of the said removal jig | hook 40 is hooked in four places of the circumference of the flange 17a in the resin-made exterior body 17 of the outer ring side seal ring 81.
[0036]
Here, a procedure for removing the outer ring side seal ring 81 will be described. That is, if the notch 17 b is provided in the flange 17 a of the resin outer casing 17, the flange of the resin outer casing 17 is attached in a state where the outer ring side seal ring 81 is attached to the shoulder on the inner peripheral surface of the outer ring member 2. A recess is formed between the notch 17b provided in 17a and the vehicle inner side end surface of the outer ring member 2. Therefore, as shown in FIG. 7, the arm of the removal jig 40 against the above-described recess in a state where the contact plate 43 a of the removal jig 40 is in contact with the end surface of the hub wheel 31 on the vehicle inner side. The claw 42c, 42c at the tip of 42, 42 is hooked and the screw shaft 43 is turned. As a result, the body 41 and the arms 42 and 42 are moved in the direction of the arrow in FIG. 7, so that the outer ring side seal ring 81 is pulled out from the outer ring member 2 together with the body 41 and removed.
[0037]
As described above, the outer ring side seal ring 81 can be easily removed using the removal jig 40, so that even if the forward / reverse detection sensor 15 integrated with the outer ring side seal ring 81 breaks down, it can be performed quickly and easily. Can be exchanged.
[0038]
Hereinafter, other embodiments and application examples of the present invention will be described.
[0039]
(1) For the outer ring side seal ring 81 integrated with the forward / reverse detection sensor 15, as shown in FIGS. 8 and 9, the harness 21 is embedded in the resin exterior body 17 without providing the connector 20. There is also a type in which the signal line 21 a of the harness 21 is directly connected to the forward / reverse detection sensor 15. In addition, the convex part 17c for preventing the bending of the harness 21 with respect to the circumference predetermined position of the resin-made exterior body 17 is provided in the state which protrudes diagonally outward in radial direction. The outer ring side seal ring 81 of this type is the same as the above embodiment in that the notch 17b is provided in the resin outer casing 17.
[0040]
(2) The present invention also includes a rotation detector having no sealing function. For example, although not shown, the outer ring side seal ring 81 is formed by eliminating the annular plate 83b and the lips 84, 85 of the annular core 83 (sensor assembly), and the inner ring side seal ring 82 is provided with the lip 87. , 88 can be eliminated. The rotation detector having such a configuration is the same as the above embodiment in that the notch 17b is provided in the resin exterior body 17.
[0041]
(3) The arrangement of the forward / reverse detection sensor 15 and the pulsar ring 16 is not particularly limited. Further, 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 inner ring member 3. A rolling bearing device used on the driven wheel side of the automobile is also included in the present invention.
[0042]
(4) The position where the hook (notch 17b) is formed with respect to the resin exterior body 17 is not particularly limited. For example, the hook portion can also be provided as a recess with respect to the end surface in the radial direction of the flange 17 a of the resin exterior body 17.
[0043]
【The invention's effect】
In the sensor assembly, the seal device, and the rolling bearing device of the present invention, the member (metal ring, outer ring side seal ring) to which the magnetic sensor is attached can be easily removed using a removal jig. Therefore, replacement of the magnetic sensor and the like can be performed quickly and easily.
[Brief description of the drawings]
1 is a cross-sectional view showing a rolling bearing device according to an embodiment of the present invention. FIG. 2 is an enlarged view of a part of FIG. 1. FIG. 3 is a perspective view showing the seal device of FIG. 4 is a diagram showing a phase relationship of detection signals of the forward / reverse detection sensor in FIG. 1. FIG. 5 is an explanatory diagram of the forward / reverse detection sensor in FIG. 1. FIG. 6 is a front view of the outer ring side seal ring shown in FIG. FIG. 7 is a side view showing a state when the outer ring side seal ring is removed from the rolling bearing device of FIG. 1. FIG. 8 is a sectional view showing a rolling bearing device according to another embodiment of the present invention. 9] Perspective view of the outer ring side seal ring used in the rolling bearing device of FIG. 8 as seen from the front side.
DESCRIPTION OF SYMBOLS 1 Rolling bearing apparatus 2 Outer ring member 3 Inner ring member 8 Vehicle inner side seal apparatus 81 Outer ring side seal ring 82 Inner ring side seal ring 15 Forward / reverse detection sensor (magnetic sensor)
16 Pulsar ring (magnetic ring)
17 Plastic exterior body 17b Notch (hook)

Claims (3)

A sensor assembly that is fixed to an outer ring member that is a fixed ring and detects a rotation state of an inner ring member that is a rotating ring,
A metal ring, a magnetic sensor for detecting a magnetic ring fixed to the outer peripheral surface of the inner ring member, and a resin exterior body that covers the outside of the magnetic sensor and is integrated with the metal ring. And the resin outer body is press-fitted to the inner periphery of the outer ring member, and the resin outer body is provided at four circumferentially equidistant locations separated from the installation location of the magnetic sensor in the circumferential direction. A sensor assembly, comprising: a hook portion to which a removal jig used when removing the sensor assembly from the outer ring member is hooked. It is a combination of an outer ring side seal ring fixed to an outer ring member serving as a fixed ring and an inner ring side seal ring fixed to an inner ring member serving as a rotating ring,
A magnetic sensor is integrated on the outer periphery of the outer ring side seal ring via a resin outer casing, a magnetic ring is fixed to the inner ring side seal ring, and the magnetic ring is detected by the magnetic sensor and the inner ring is detected. The rotation state of the member is detected, and the resin outer casing is press-fitted to the inner periphery of the outer ring member, and the resin outer casing is circumferentially installed from the installation location of the magnetic sensor. A sealing device characterized in that hooking portions to which a removing jig used when removing the outer ring side seal ring from the outer ring member is hooked are provided at four circumferentially equidistant locations . An inner ring member that is a rotating ring having a raceway surface, an outer ring member that is concentrically arranged on the outer periphery of the inner ring member and has a raceway surface corresponding to the inner ring member, and each of the inner ring member and the outer ring member A rolling bearing device comprising: a rolling element interposed between raceway surfaces; and a seal device that seals a gap between the inner ring member and the outer ring member,
The seal device is a combination of 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 a resin exterior body is provided on the outer periphery of the outer ring side seal ring. Through which the magnetic sensor is integrated, the magnetic ring is fixed to the inner ring-side seal ring, the magnetic sensor detects the magnetic ring and detects the rotational state of the inner ring member, The resin outer body is press-fitted to the inner periphery of the outer ring member, and the outer ring member is arranged at four circumferentially spaced locations away from the installation location of the magnetic sensor of the resin outer body. A rolling bearing device, characterized in that a hooking portion is provided on which a removal jig used when removing the outer ring side seal ring is hooked.

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