JP2002206557A - Bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a bearing device having a sealing device and a rotating speed detector by reducing an installation space for the sealing device and the rotating speed detector in the axial direction. SOLUTION: The sealing device 7 disposed between inner and outer ring members 24 and 21 rotated relative to each other is formed in a pack seal having two annular bodies 71 and 72 combined with each other. The pulsar ring 81 of the rotating speed detector 8 is installed on a second annular body 72 installed in the rotation side member 24 of the inner and outer ring members. The sensor 82 of the rotating speed detector 8 is detachably stored in a through- hole 21a provided in the fixed side member 21 of the inner and outer ring members in an area opposed radially to the pulsar ring 81. A window 71f for facing the sensor 82 to the pulsar ring 81 is provided at the installation portion of the first annular body 71.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bearing device having a sealing device and a rotational speed detecting device.

[0002]

2. Description of the Related Art Generally, a shoulder of an axle bearing device has
Although a sealing device is attached, in recent years, it has been considered to attach a rotation speed detecting device used for an anti-lock brake system of an automobile or the like to the side of the sealing device described above. As the rotation speed detecting device described above, a device using a sensor and a pulsaring is generally used.

As such a structure, for example, Japanese Patent Application Laid-Open
In this example, a sealing device is provided on one side in the axial direction between the inner and outer rings, and the sealing device is provided inside the sealing device and relative to the outer ring independently of the sealing device. The sensor of the rotational speed detector is attached, and the pulsar ring of the rotational speed detector is attached to the inner ring.

[0004]

In the above-mentioned prior art, since the sealing device and the rotational speed detecting device are separately installed side by side in the axial direction, the installation space in the axial direction becomes uselessly large. It is pointed out that.

In view of such circumstances, the present invention provides a bearing device having a sealing device and a rotational speed detecting device.
An object of the present invention is to reduce the installation space in the axial direction of the sealing device and the rotation speed detecting device and to make the device compact.

[0006]

A first bearing device according to the present invention has a structure in which a sealing device and a rotation speed detecting device are incorporated on one axial side of a relatively rotating inner / outer ring member. A seal formed by combining a first ring attached to the fixed side member of the inner and outer ring members and a second ring attached to the rotating side member of the inner and outer ring members; and A rubber lip forming a sealed portion with the other ring body is attached to the ring body, and the rotation speed detecting device detects the pulsar ring and the relative position change due to the rotation of the pulsar ring. A sensor for detecting, wherein the pulsar ring is attached to the second ring, and the sensor is formed at one position on a circumference corresponding to a mounting region of the first ring on the fixed side member. For radial through holes It is mounted detachably accommodating a window for making the face of said sensor and pulser ring to the mounting portion with respect to the fixed member in the first ring member is provided, is characterized in that.

In a second bearing device according to the first aspect of the present invention, in the first configuration, the first ring is connected to a cylindrical portion fitted and fixed to the fixed member and an outer end of the cylindrical portion. An annular plate portion extending inward in the radial direction, a hole penetrating through the cylindrical portion of the first annular body in the radial direction as the window is provided, and the second annular body is A small-diameter cylindrical portion fitted and fixed to the rotation-side member, and a small gap is radially opposed to the small-diameter cylindrical portion via a predetermined gap in the first annular body. A large-diameter cylindrical portion that is opposed to the second cylindrical member, and an annular plate portion that is connected between the outer ends of the two cylindrical portions and extends along the radial direction. The pulsar ring is attached to the pulsar ring.

In a third bearing device according to the present invention, in the first configuration, the first ring body is connected to a cylindrical portion fitted and fixed to the fixed side member and an outer end of the cylindrical portion. An annular plate portion extending inward in the radial direction, a hole penetrating in the radial direction as the window is provided in the cylindrical portion of the first annular body, and the second annular body is A cylindrical portion fitted and fixed to the rotation-side member; and an annular plate portion connected to the outer end of the cylindrical portion and extending radially outward. The pulsar ring is attached to a side surface.

The fourth bearing device according to the present invention comprises the first to third bearings.
Wherein the pulsaring is a multipolar magnetized member which is magnetized by changing the polarity in the circumferential direction alternately to rubber or resin containing magnetic powder, and the sensor is a magnetic sensor, I have.

The fifth bearing device according to the present invention is characterized in that the first to fourth bearings are provided.
Wherein the sensor is mounted to the through hole of the fixed side member by press fitting or screw connection.

In short, according to the present invention, the sealing device installed between the inner and outer ring members is a seal combining two annular members, and the seal attached to the rotating member of the inner and outer ring members is one of the seals. While the pulsar ring of the rotation speed detecting device is attached to the two rings, the sensor of the rotation speed detecting device is attached to the fixed side member of the inner and outer ring members with respect to a through hole provided in a region radially opposed to the pulsar ring. A window is opened in a portion of the seal where the first ring is attached to the fixed side member, and the sensor and the pulsar ring face each other through this window.

[0012] As described above, since the rotational speed detecting device is installed so as to overlap the sealing device in the axial direction,
Their installation space in the axial direction is reduced.

In the second and third configurations, preferred examples of the shape of the two rings of the sealing device are shown.
This is advantageous in managing the relative position between the sensor and the pulsaring with high accuracy.

In the fourth configuration, the pulsaring is a multipolar magnetized member and the sensor is a magnetic sensor.
Even when the motor is not rotating, a signal indicating the state can be output.

In the fifth configuration, the sensor can be easily attached and detached, so that maintenance of the sensor is facilitated.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on embodiments shown in the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention. Here, as the bearing device, an axle bearing device to which a driving wheel of an automobile is attached will be described as an example. FIG. 1 is a cross-sectional view showing a bearing device for an axle, and FIG.

The axle bearing device shown in FIG.
, A double row rolling bearing 2 and a constant velocity joint 3.

The hub wheel 1 has a hollow structure, a radially outward flange 11 is formed at an axially intermediate portion of the outer peripheral surface, and a spline (not shown) is provided in a required area of the hollow hole. And a raceway surface 12 of a ball 22 group on the vehicle outer side of the double row rolling bearing 2 on the vehicle inner side of the flange 11 on the outer peripheral surface.

The double row rolling bearing 2 includes a single outer ring 21 having two rows of raceway grooves, a plurality of balls 22 as rolling elements arranged in two rows, two crowned cages 23, And an inner ring 24 related to the ball 22 group on the vehicle inner side,
The inner ring of the ball group 22 on the vehicle outer side does not exist because the raceway surface of the hub wheel 1 is used as described above.

The constant velocity joint 3 is called a known Zeppa type (Barfield type) constant velocity joint, and includes an outer ring 31, an inner ring 32, a ball 33 and a retainer 34.
It is composed of Outer ring 31 is inner ring 32, ball 3
Bowl-shaped portion 35 in which the container 3 and the retainer 34 are stored and arranged
And a shaft portion 3 integrally connected to the small diameter side of the bowl-shaped portion 35.
6 is comprised. A spline is formed on the outer peripheral surface of the shaft portion 36, and the spline is fitted into the hollow hole of the hub wheel 1.

A double row rolling bearing 2 is mounted on the outer peripheral surface of the hub wheel 1. The inner end of the hub wheel 1 on the vehicle inner side is bent radially outward and is caulked to the inner side end surface of the inner race 24 of the double row rolling bearing 2. The caulking portion is denoted by reference numeral 14.

Further, the constant velocity joint 3 is coupled to the hub wheel 1 in such a form as to be adjacent to the double row rolling bearing 2. This combination will be described later.

Then, a disc rotor and wheels of a disc brake device (not shown) are applied to the flange 11 of the hub wheel 1 and mounted by a plurality of bolts 13. A radially outward flange 25 provided on the outer ring 21 of the double row rolling bearing 2 is bolted to the knuckle 6 on the vehicle body side. Furthermore, constant velocity joint 3
The shaft 5 is spline-fitted to the inner ring 32, and is fixed by a retaining ring (reference numeral omitted) or the like. The other end of the shaft 5 is attached to a differential device of the vehicle via another constant velocity joint (not shown).

In such an axle bearing device, the rotational power of the shaft 5 is transmitted to a wheel (not shown) attached to the hub wheel 1 via the constant velocity joint 3.

The manner in which the constant velocity joint 3 is connected to the hub wheel 1 will be described. First, in the hollow hole of the hub wheel 1, a spline is formed only in the axially intermediate region, and the diameter of the spline in the axially intermediate region is larger than the diameter of the groove bottom in the axially intermediate region. The enlarged diameter regions at both ends are cylindrical surfaces. The reference numeral 15 is assigned to the diameter-increasing area on the vehicle inner side,
The reference numeral 16 is assigned to the diameter-enlarged area on the vehicle outer side.

A peripheral groove 37 is provided on the outer ring 31 of the constant velocity joint 3 at the end edge of the shaft portion 36.
A C-shaped retaining ring 38 is fitted into the peripheral groove 37 so as to partially protrude.

The shaft 36 of the outer race 31 of the constant velocity joint 3 is spline-fitted into the hollow hole of the hub wheel 1 from the vehicle inner side, so that the shaft 36
The inner end of the spline on the vehicle inner side is the hub wheel 1
When the spline abuts against the vehicle inner end portion, the C-shaped retaining ring 38 mounted on the shaft portion 36 reaches the enlarged diameter region 16 on the vehicle outer side in the hollow hole, and the C-shaped retaining ring 38 Are spread radially outward and come into contact with the enlarged diameter region. As a result, the female spline of the hub wheel 1 is sandwiched between the vehicle inner side edge of the male spline of the shaft portion 36 and the C-shaped retaining ring 38 from both sides in the axial direction. The joint 3 is in a non-separable state.

The first embodiment has a feature in the manner in which the sealing device 7 and the rotational speed detecting device 8 are mounted on the double row rolling bearing 2, and will be described in detail below.

First, the sealing device 7 is a pack seal having a configuration in which a seal ring 71 as a first ring and a slinger 72 as a second ring are combined.

The seal ring 71 has a configuration in which, for example, a main lip 71b and an auxiliary lip 71c of, for example, nitrile rubber (NBR) are attached to a metal annular core 71a. The annular core 71a includes a cylindrical portion 71d extending in the axial direction,
An annular plate 71e is formed by bending the inner end side of the cylindrical portion 71d in the axial direction radially inward.

The slinger 72 is formed by bending a metal plate, for example, and has a large-diameter cylindrical portion 72 located inside and outside in the radial direction.
a and the small-diameter cylindrical portion 72b,
An annular plate portion 72c extending in the radial direction that connects the axially outer end side of 72b is provided.

The seal ring 71 is fixed by press-fitting the cylindrical portion 71d of the annular core 71a to the inner peripheral surface of the outer ring 21 on the vehicle inner side, and the slinger 72 is fixed to the small-diameter cylindrical member. The portion 72b is fixed by press-fitting to the outer peripheral surface of the inner race 24 on the vehicle inner side. In this state, the annular plate portion 71e of the seal ring 71 and the annular plate portion 72c of the slinger 72 face each other at a predetermined interval in the axial direction, and the cylindrical portion 71d of the seal ring 71 and the large-diameter cylinder of the slinger 72. Part 72
a are opposed to each other at a predetermined interval in the radial direction.
The main lip 71b and the auxiliary lip 71c of the seal ring 71 are brought into contact with the small-diameter cylindrical portion 72b of the slinger 72, thereby forming a sealed portion.

The rotation speed detecting device 8 includes a pulsaring 81
And the sensor 82 are combined.

The pulsar ring 81 is made of a multipolar magnetized member magnetized in a form in which the polarity is alternately changed in the circumferential direction to rubber or resin containing magnetic powder. It is fixed by being adhered with an adhesive or the like.

The sensor 82 is a magnetic sensor such as a Hall element, for example.
It is detachably fixed by being press-fitted from the outer diameter side into a through hole 21a penetrated in the radial direction at a plurality of locations.

The sensor 82 attached to the outer race 21
In order to face the pulsar ring 81 attached to the slinger 72,
Window 71f radially penetrating cylindrical portion 71d in 1a
Is provided.

As described above, with the sealing device 7 attached to the double row rolling bearing 2, the slinger 7 of the sealing device 7 is used.
The pulsar ring 81 of the rotation speed detecting device 8 is attached to an area within the installation width of the large-diameter cylindrical portion 72a in FIG. 2, and the outer ring 21 is radially opposed to the pulsar ring 81.
The sensor 82 of the rotation speed detecting device 8 is attached to the through hole 21a provided in.

Thus, since the rotational speed detecting device 8 can be installed within the installation width of the sealing device 7, the portion that protrudes in the axial direction from the installation space of the double row rolling bearing 2 can be eliminated. Is achieved.

Moreover, the sensor 82 of the rotational speed detecting device 8
Is simply fixed by being fitted into the through hole 21a formed in the outer ring 21 of the double row rolling bearing 2 from the outer diameter side, so that the sensor 82 can be easily and quickly replaced. This is advantageous in practical use.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the difference from the above embodiment is that
Mainly, the shape of the slinger 72 of the sealing device 7 and the shape of the pulsar ring 81 of the rotation speed detecting device 8.

More specifically, the slinger 72 has a large-diameter cylindrical portion 72a eliminated, and the pulsar ring 81 is made thicker in the radial and axial directions with respect to the inner surface of the annular plate portion 72c.
The structure is adhered. The pulsaring 81 has the same configuration as that described in the above embodiment.
In this embodiment, substantially the same operation and effect as those of the above embodiment can be obtained.

It should be noted that the present invention is not limited to only the above embodiment, and various applications and modifications are conceivable.

(1) In addition to the axle bearing device exemplified in the above embodiment, the present invention is applied to all axle bearing devices as shown in FIGS. 4 and 5 and other known axle bearing devices. The invention can be applied. Incidentally, the axle bearing device shown in FIG. 4 is called a third-generation driven wheel mounting type. The difference from the structure of FIG. 1 is that the hub wheel 1 is solid and the constant velocity joint 3 is provided. That is not. The axle bearing device shown in FIG. 5 is called a second-generation inner ring rotating type, which is different from the structure of FIG. 1 in that it does not include the hub wheel 1 and the constant velocity joint 3 and the inner ring on the vehicle inner side. 24, an inner ring 24 'on the vehicle outer side is provided. The manner in which the sealing device 7 and the rotation speed detecting device 8 are attached to these components is the same as in the above-described embodiment, and a description thereof will be omitted.

(2) In the above embodiment, the axle bearing device has been described as an example, but the present invention can also be applied to bearing devices used for railway vehicles, machine tools, industrial machines and the like.
An example of this type of bearing device is a deep groove ball bearing as shown in FIG. In the example of FIG.
Is fixed and the inner ring 24 is rotated, the mounting form of the pulsar ring 81 and the sensor 82 in the rotation speed detecting device 8 is basically the same as in the above-described embodiments. However, in each of the above embodiments, when the inner ring 24 is fixed and the outer ring 21 is rotated, the sensor 82 of the rotation speed detecting device 8 may be attached to the inner ring 24.

(3) In the above embodiment, an example is given in which the sensor 82 of the rotational speed detecting device 8 is a magnetic sensor, and the pulsar ring 81 is a multi-pole magnetized member. In addition to a comb-shaped ring made of a magnetic material provided with a window or a cutout, a ring made of a magnetic material formed into a shape having irregularities in the radial direction at equal circumferential intervals. It can be. Such a pulsar ring 81 can be obtained by processing the large-diameter cylindrical portion 72a of the slinger 72 in the embodiment shown in FIG. In that case, the sensor 82
May be a magnetic sensor or a proximity sensor such as an optical sensor.

[0047]

In the bearing device according to the first to fifth aspects of the present invention, since the rotation speed detecting device is installed within the installation width of the sealing device, the installation space in the axial direction can be reduced. As a result, the overall size of the bearing device can be reduced.

In addition, since the sensor of the rotation speed detecting device is detachably attached to the through hole provided in the fixed side member, the sensor can be easily and quickly exchanged, which is advantageous in practical use. Becomes

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an axle bearing device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a state in which a rotation speed detecting device in FIG. 1 is separated.

FIG. 3 is a view showing only a main part of an axle bearing device according to another embodiment of the present invention.

FIG. 4 is a sectional view showing an axle bearing device according to another embodiment of the present invention.

FIG. 5 is a sectional view showing an axle bearing device according to another embodiment of the present invention.

FIG. 6 is a sectional view showing a bearing device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub wheel 2 Double row rolling bearing 21 Outer ring of double row rolling bearing 21a Through-hole of outer ring 24 Inner ring of double row rolling bearing 3 Constant velocity joint 7 Sealing device 71 Sealing device seal ring 71a Sealing ring core metal 71d Ring core Gold cylindrical portion 71e Ring plate of annular core metal 72 Slinger of sealing device 72a Large-diameter cylindrical portion of slinger 72b Small-diameter cylindrical portion of slinger 72c Ring plate of slinger 8 Rotational speed detector 81 Sensor of rotational speed detector 82 Rotation Pulsaring of speed detector

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F16C 33/78 F16C 33/78 Z 33/80 33/80 // G01P 3/486 G01P 3/486 A 3/487 3 / 487 FCF term (reference) 3D046 BB15 BB28 HH36 3J016 AA02 AA03 BB03 BB17 3J101 AA03 AA32 AA43 AA54 AA62 AA72 BA54 BA73 FA53 GA02

Claims (5)

[Claims] 1. A bearing device in which a sealing device and a rotation speed detecting device are incorporated on one axial side of a relatively rotating inner / outer ring member, wherein the sealing device is mounted on a fixed side member of the inner / outer ring member. The seal is a combination of the first ring attached and the second ring attached to the rotation-side member of the inner and outer ring members, and a seal is formed between one of the rings and the other. A rubber lip forming a sealing portion is attached between the pulsar ring and the rotation speed detector includes a pulsar ring and a sensor that detects a change in a relative position due to the rotation of the pulsar ring. The sensor is attached to the second ring, and the sensor is detachably housed in a radial through hole formed at one place on a circumference corresponding to an attachment area of the first ring in the fixed member. Is attached and said Windows for causing the face of said sensor and pulser ring to the mounting portion is provided with respect to the fixed-side member in one ring member, it bearing device according to claim. 2. The bearing device according to claim 1, wherein the first annular member is connected to a cylindrical portion fitted and fixed to the fixed side member, and is radially inwardly connected to an outer end of the cylindrical portion. The first annular member has a cylindrical portion extending therethrough, and a hole is provided in the cylindrical portion of the first annular member so as to radially penetrate as the window. A small-diameter cylindrical portion to be fitted and fixed is opposed to the small-diameter cylindrical portion in parallel in a radial direction with a predetermined gap therebetween, and is opposed to the cylindrical portion of the first ring body with a small gap therebetween. A radial cylindrical portion, and an annular plate portion connected between the outer ends of the two cylindrical portions and extending in the radial direction, and the pulsar ring is attached to the outer peripheral surface of the large diameter cylindrical portion of the second annular body. A bearing device. 3. The bearing device according to claim 1, wherein the first annular body is connected to a cylindrical portion fitted and fixed to the fixed side member, and is radially inwardly connected to an outer end of the cylindrical portion. An annular plate portion extending in the radial direction, and a hole penetrating in the radial direction as the window is provided in the cylindrical portion of the first annular member, and the second annular member is provided with respect to the rotation-side member. It has a cylindrical portion fitted and fixed, and an annular plate portion connected to the outer end of the cylindrical portion and extending radially outward, and the pulsar ring is attached to the inner surface of the annular plate portion of the second annular body. A bearing device. 4. The bearing device according to claim 1, wherein the pulsar ring is a multi-pole magnetized member which is magnetized by changing the polarity in a circumferential direction alternately on rubber or resin containing magnetic powder, A bearing device, wherein the sensor is a magnetic sensor. 5. The bearing according to claim 1, wherein the sensor is mounted in the through hole of the fixed side member by press fitting or screw connection. apparatus.