JPH09196073A - Rolling bearing unit with tone wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the manufacture and the handling of a member, in which a tone wheel is assembled, and to lower the cost. SOLUTION: A seal ring 19 is fitted for fixation in the inner peripheral surface of an end of an outer ring 5a, which is not rotated. A slinger 26 is fitted for fixation on the peripheral surface of an end of an inner ring 4a, which is rotated. Tip edges of seal rips 25a, 25b, 25c provided in the seal ring 19 are made to slide-contact with the slinger 26. A tone wheel 29 made of a magnetic metal plate is held by an elastic material 30, and a locking part 32 formed in the elastic material 30 is locked with the peripheral edge of a rotating side wheel part 28 of the slinger 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION A rolling bearing unit with a tone wheel according to the present invention rotatably supports a vehicle wheel with respect to a suspension device and detects the rotational speed of the wheel supported by the rolling bearing unit. To use for.

[0002]

2. Description of the Related Art An automobile wheel is rotatably supported by a suspension system, and an antilock brake system (ABS) and a traction control system (TC) are provided.
In order to detect the rotational speed of this wheel in order to control S), a rolling bearing unit as disclosed in, for example, Japanese Utility Model Laid-Open No. 5-27679 is conventionally known. The rolling bearing unit described in this publication is constructed as shown in FIG. One end of the hub 1 (the end that is the outer side in the width direction when assembled to an automobile, the left end in FIG. 5) is provided with a wheel fixing flange 2 on the outer peripheral surface, and the inner ring raceway 3a is provided on the outer peripheral surface of the intermediate portion. Is forming. In addition, the other end of the hub 1 (the end that is the center side in the width direction when assembled to an automobile, the right end in FIG. 5) is on the outer peripheral surface, and the inner ring raceway 3b is formed on the outer peripheral surface.
The outer ring 4 having the inner ring 4 is externally fitted.

Further, a mounting portion 6 for supporting the outer ring 5 on a suspension device is formed on the outer peripheral surface of the outer ring 5, and double row outer ring raceways 7a, 7b are also formed on the inner peripheral surface. . A plurality of rolling elements 8, 8 are provided between the outer raceways 7a, 7b and the inner raceways 3a, 3b, respectively, inside the outer race 5 supported by the suspension device by the mounting portion 6, The hub 1 is rotatably supported. The seal rings 9 and 10 are fitted and fixed in the openings of both ends of the outer ring 5, and the inner peripheral edges of the seal rings 9 and 10 are slidably contacted with the outer peripheral surface of the hub 1 or the inner ring 4, respectively. The inside of the outer ring 5 is designed to prevent rainwater and dust from entering the rolling elements 8 and 8 installation portions.

Of the pair of seal rings 9 and 10, the seal ring 9 on the inner side in the width direction has a function of preventing the rainwater and dust from entering and also detects the rotational speed of the hub 1. It has a function as a tone wheel. That is, as shown in detail in FIG. 6, the seal ring 9 has an inner diameter side seal ring 11 externally fitted and fixed to an inner ring 4 rotating with a wheel, and an outer diameter side seal ring 12 internally fitted and fixed to a fixed outer ring 5. Composed by combining and.

Both the inner diameter side and the outer diameter side seal rings 11,
Reference numeral 12 is configured by combining cored bars 13a and 13b with sealing materials 14a and 14b such as rubber and synthetic resin. The cores 13a and 13b are circular ring portions 15a and 15b and circular ring portions 15a and 15b, respectively.
And cylindrical portions 16a and 16b bent from the peripheral edge of the. Then, these cylindrical portions 16a and 16b are connected to the inner ring 4
The outer ring 5 or the outer ring 5 is fitted to the inner ring 4 or the outer ring 5 to be supported and fixed. Along with this, the sealing materials 14a, 14 reinforced by the respective cores 13a, 13b
The peripheral portion of b is slidably contacted with the peripheral surfaces of the core metals 13b and 13a on the other side. Further, a large number of through holes 17 are formed in the circular ring portion 15a of the core metal 13a externally fitted and fixed to the inner ring 4 that rotates together with the wheel, at equal intervals in the circumferential direction. Then, the detecting portion of the sensor 18 for detecting the rotational speed, which is supported by the non-rotating portion such as the suspension device, is opposed to the through hole 17.

In the case of the tone wheel rolling bearing unit as described above, the flange 2 provided at one end of the hub 1
The wheel fixed to can be rotatably supported by the suspension device that supports the outer ring 5. Further, when the inner diameter side seal ring 11 externally fitted and fixed to the inner ring 4 rotates as the wheel rotates, the sensor 1 facing the inner diameter side seal ring 11 rotates.
The output of 8 changes. The frequency at which the output of the sensor 18 changes is proportional to the wheel rotation speed. Therefore, if the output signal of the sensor 18 is input to a controller (not shown), the rotation speed of the wheel can be obtained and the ABS or TCS can be appropriately controlled.

[0007]

In the case of the conventional rolling bearing unit with a tone wheel configured and operating as described above, the seal material 14a is provided on both the inner diameter side seal ring 11 and the outer diameter side seal ring 12. 14b is provided.
Therefore, it is necessary to pay sufficient attention to the manufacturing and handling of both of these seal rings 11 and 12. That is,
The sealing material 14a supported on the core metal 13a of the inner diameter side seal ring 11 having a function as a tone wheel must be not damaged (muddy water resistant) by muddy water applied when the vehicle is running. Further, the seal members 14a and 14b constituting the both seal rings 11 and 12 do not have their leading edges damaged before being assembled between the outer peripheral surface of the inner ring 4 and the inner peripheral surface of the outer ring 5 after manufacturing. As such, it is necessary to be careful in handling. As a result, the cost of the rolling bearing unit with a tone wheel incorporating the inner diameter side seal ring 11 increases.

[0008]

A rolling bearing unit with a tone wheel according to the present invention has a member corresponding to an outer ring which has an outer ring raceway on its inner peripheral surface and does not rotate during use, like the above-described conventional rolling bearing unit with a tone wheel. An inner ring equivalent member having an inner ring raceway on the outer peripheral surface and rotating at the time of use, a plurality of rolling elements provided between the outer ring raceway and the inner ring raceway, and an inner fitting on the end inner peripheral surface of the outer ring equivalent member. A seal ring that is fixed and closes the gap between the end inner peripheral surface and the end outer peripheral surface of the inner ring equivalent member over the entire circumference; A tone wheel is provided which alternately changes magnetic characteristics over an equal interval and is fitted and fixed to an outer peripheral surface of an end portion of the member corresponding to the inner ring. In particular, in the rolling bearing unit with a tone wheel according to the present invention, a slinger having an L-shaped cross section and formed entirely in an annular shape is formed on the inner peripheral edge portion of the outer peripheral surface of the end portion of the inner ring equivalent member. The inner diameter side cylinder part is externally fitted to the outer peripheral surface of the end part, and the rotating side circular ring part bent from the outer end edge of the inner diameter side cylinder part is fixed in a state of protruding radially outward from the outer peripheral part of the end part. Has been done. Further, on the inner peripheral surface of the end portion of the outer ring-corresponding member, a cored bar having an L-shaped cross-section and forming the entire seal ring is provided. The fixed-side circular ring portion that is fitted in the inner peripheral surface of the end portion and bent from the outer diameter side cylindrical portion projects radially inward from the inner peripheral surface of the end portion at a position axially inward of the rotating side circular ring portion. It is fixed in the opened state. Then, a sealing material having a plurality of sealing lips for slidably contacting the respective leading edges with the slinger is fixed to the fixed side circular portion over the entire circumference. The tip edge of at least one seal lip is in sliding contact with the inner side surface of the rotating side circular ring portion. Further, the tone wheel is attached and fixed to the outer side surface of the rotating side circular ring portion by engaging a locking portion formed on the outer peripheral edge portion of the tone wheel with the outer peripheral edge of the rotating side circular ring portion. There is.

[0009]

The rolling bearing unit with a tone wheel of the present invention configured as described above rotatably supports the wheel of the automobile with respect to the suspension device, and the operation of detecting the rotational speed of the wheel is as follows. This is similar to the above-described conventional rolling bearing unit with a tone wheel. In particular, in the case of the rolling bearing unit with a tone wheel of the present invention, the sealing material is fixed only to the core metal, not to the slinger. A tone wheel is only attached to the outer side surface of the rotary side circular ring portion that constitutes the slinger. Therefore, manufacturing and handling of these slinger and tone wheel are facilitated, and the cost of the rolling bearing unit with a tone wheel can be reduced.

[0010]

1 and 2 show a first embodiment of the present invention. A double-row outer ring raceway 7 is formed on the inner peripheral surface of the outer ring 5a that does not rotate during use. Further, inner ring raceways 3 are formed on the outer peripheral surfaces of a pair of inner rings 4a that are externally fitted and fixed to an axle (not shown) and rotate during use. A plurality of rolling elements 8 are provided between each of the outer ring raceways 7 and the inner ring raceway 3, and the outer ring 5 is
The axle is rotatably supported inside a. still,
Although balls are used as the rolling elements 8 in the illustrated example, tapered rollers may be used as the rolling elements in the case of a rolling bearing unit for an automobile, which is heavy in weight.

A seal ring 19 is fitted and fixed on the inner peripheral surface of the end portion of the outer ring 5a.
The gap 20 between the inner peripheral surface of the end portion of the outer ring 5a and the outer peripheral surface of the end portion of the inner ring 4a is closed over the entire circumference. The seal ring 19 includes a cored bar 21 made of a steel plate or the like,
The seal member 22 is made of an elastic material such as rubber or elastomer. Of these, the cored bar 21 is formed in an annular shape with an L-shaped cross section, and has an outer diameter side cylindrical portion 23 formed on the outer peripheral edge portion and the outer diameter side cylindrical portion 23.
From the end edge (the left end edge in FIGS. 1 and 2) of FIG. In such a cored bar 21, the outer diameter side cylindrical portion 23 is fitted in and fixed to the inner peripheral surface of the end portion of the outer ring 5a, and the fixed side circular ring portion 24 is radially inner from the inner peripheral surface of the end portion of the outer ring 5a. It is projected toward.
The sealing material 22 is supported and fixed to the fixed side annular portion 24, and has a plurality (three in the illustrated example) of sealing lips 25a, 25b, 25c.

On the other hand, a slinger 26, which is L-shaped in cross section and is formed in an annular shape as a whole, is externally fitted and fixed to the outer peripheral surface of the end portion of the inner ring 4a. The slinger 26 is formed of a metal plate such as a steel plate and a stainless steel plate into an annular shape with an L-shaped cross section, and the inner diameter side cylindrical portion 2 formed at the inner peripheral edge portion.
7 and a rotating side circular ring portion 28 that is bent at a right angle from the end edge (the right end edge in FIGS. 1 and 2) of the inner diameter side cylindrical portion 27 to the outside in the diametrical direction. In such a slinger 26, the inner diameter side cylindrical portion 27 is externally fitted and fixed to the end outer peripheral surface of the inner ring 4a, and the rotating side circular ring portion 28 is diametrically outward from the end outer peripheral surface of the inner ring 4a. It is protruding.

In the state where the slinger 26 is externally fitted and fixed to the outer peripheral surface of the end portion of the inner ring 4a in this manner, the rotary side circular ring portion 28 is
It exists on the opening end side (right side in FIGS. 1 and 2) of the gap 20 with respect to the fixed-side annular portion 24. Then, the three seal lips 25a, 25b provided on the sealing material 22 are
Of the 25c, the seal lip 2 provided on the outermost diameter side
The tip edge of 5a is the inner side surface of the rotating side annular portion 28 (see FIGS.
2 left side surface) and the remaining two seal lips 25
The tip edges of b and 25c are in sliding contact with the outer peripheral surface of the inner diameter side cylindrical portion 27.

Further, a tone wheel 29 is attached and supported on the outer side surface (right side surface in FIGS. 1 and 2) of the rotating side circular ring portion 28 via an elastic material 30 such as synthetic resin or hard rubber. This tone wheel 29 is, for example, 0.6 to 2.0.
It is made by punching a magnetic material such as a mild steel plate having a thickness of about mm, and a plurality of notches 31 each of which has an opening on the outer peripheral edge are formed at equal intervals along the circumferential direction. Is forming. Therefore, this tone wheel 29
It is formed in a comb shape. The punching process is preferably performed from the inner side surface side (left side surface side in FIGS. 1-2) of the tone wheel 29 to the outer side surface side (right side surface in FIGS. 1-2). The reason for this is that each of the above notches 31
This is to improve the detection accuracy of the sensor 18 by sharpening the edge of the sensor 18 on the side facing the sensor 18 (see FIG. 5).

The elastic material 30 is molded in a state of enclosing the tone wheel 29 as described above. That is,
The elastic member 30 covers both the inner and outer peripheral portions of the tone wheel 29 and the inner peripheral side half of the outer side surface of the tone wheel 29, and enters the notches 31 to integrally embed the tone wheel 29. Has been formed. Further, a locking portion 32 having an L-shaped cross section is provided on the outer peripheral edge portion of the inner surface (left side surface of FIGS. 1 and 2) of the elastic material 30 intermittently over the entire circumference or in the circumferential direction. Is formed. Tone wheel 29 above
Is fixedly attached to the outer side surface of the rotating side circular ring portion 28 by locking the locking portion 32 to the outer peripheral edge portion of the rotating side circular ring portion 28.

In the rolling bearing unit with a tone wheel of the present invention constructed as described above, the sealing material 22 is fixed only to the cored bar 21 and not to the slinger 26. Rotating side circular ring portion 2 that constitutes the slinger 26
8, the tone wheel 29 is only attached to the outer surface thereof. Therefore, the slinger 26 and the tone wheel 29 can be easily manufactured and handled, and the cost of the rolling bearing unit with the tone wheel can be reduced. That is, in the case of the structure of the first example shown in FIGS.
Sliding the tone wheel 29 through the elastic material 30 to the slinger 26
Although the elastic material 30 has a function of connecting the tone wheel 29 and the slinger 26, the elastic material 30 does not have a sealing function. Therefore, it is not necessary to limit the material of the elastic material 30 in terms of maintaining the sealing property. or,
No problem occurs even if the elastic member 30 is slightly scratched, so that it is not necessary to handle the slinger 26 provided with the tone wheel 29 with particular care. In other words, since only the handling of the seal ring 19 needs to be taken care of, the parts management and the parts handling become easy.

Next, FIG. 3 shows a second embodiment of the present invention.
An example is shown. In the case of this example, the elastic material 30 (see FIGS.
2) is omitted and, instead, the tone wheel 29 is formed by folding back the outer peripheral edge of the tone wheel 29, and the tone wheel 29 is formed on the outer side surface of the rotary side annular portion 28 that constitutes the slinger 26 (the right side in FIG. 3). The surface) is attached and supported. That is, the tongue piece 3 existing between the notches 31 adjacent to each other in the circumferential direction at the outer peripheral portion of the tone wheel 29.
The tip end of 3 is folded back at the outer peripheral edge of the rotating side circular ring portion 28 to form a locking portion 32a, and the tone wheel 29 is attached to the outer surface of the rotating side circular ring portion 28 by this locking portion 32a. I support you. If there is a possibility that the locking portion 32a interferes with the seal ring 19, the part of the magnetic metal plate forming the tone wheel 29 may be thinned in the portion forming the locking portion 32a. Such thinning work is performed by coining before forming the locking portion 32a, or by cutting with a lathe after forming. Other configurations and operations are similar to those of the above-described first example.

Next, FIG. 4 shows a third embodiment of the present invention.
An example is shown. In the case of this example, a plurality of through holes 34 are formed in the tone wheel 29a made of a magnetic metal plate at equal intervals in the circumferential direction. The outer peripheral edge portion of the tone wheel 29a is folded back at the outer peripheral edge portion of the rotating side circular ring portion 28 to form a locking portion 32b. The locking portion 32b causes the tone wheel 29a to rotate around the rotating side circular ring portion 28.
Is attached to and supported on the outer side surface (right side surface in FIG. 4) of. If the work of folding the outer peripheral edge of the tone wheel 29a over the entire circumference is troublesome, a plurality of notches are formed in the outer peripheral edge of the tone wheel 29a so that the folding work can be performed with a light force, and the tone wheel 29a can be processed. It is also possible to do so without distorting 29a. Other configurations and operations are the same as those of the above-described second example.

[0019]

Since the rolling bearing unit with a tone wheel of the present invention is constructed and operates as described above, the manufacturing and handling of the member incorporating the tone wheel can be facilitated and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a first example of an embodiment of the present invention.

FIG. 2 is a sectional view showing a slinger and a seal ring, to which the tone wheel is also attached, taken out.

FIG. 3 is a view similar to FIG. 2, showing a second example of the embodiment of the present invention;

FIG. 4 is a view similar to FIG. 2, showing a third example.

FIG. 5 is a sectional view showing an example of a conventional rolling bearing unit with a tone wheel.

FIG. 6 is an enlarged cross-sectional view of part A in FIG.

[Explanation of symbols]

 1 hub 2 flange 3, 3a, 3b inner ring raceway 4, 4a inner ring 5, 5a outer ring 6 mounting portion 7, 7a, 7b outer ring raceway 8 rolling element 9, 10 seal ring 11 inner diameter side seal ring 12 outer diameter side seal ring 13a, 13b Core bar 14a, 14b Seal material 15a, 15b Circular ring part 16a, 16b Cylindrical part 17 Through hole 18 Sensor 19 Seal ring 20 Gap 21 Core bar 22 Seal material 23 Outer diameter side cylindrical part 24 Fixed side circular ring part 25a, 25b , 25c Seal lip 26 Slinger 27 Inner diameter side cylindrical portion 28 Rotation side circular ring portion 29, 29a Tone wheel 30 Elastic material 31 Notch 32, 32a, 32b Locking portion 33 Tongue piece 34 Through hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G01P 3/488 G01P 3/488 L

Claims (1)

[Claims] 1. An outer ring equivalent member which has an outer ring raceway on its inner peripheral surface and does not rotate during use, an inner ring equivalent member which has an inner ring raceway on its outer peripheral surface and rotates during use, and between the outer ring raceway and the inner ring raceway. The plurality of rolling elements provided and the inner peripheral surface of the end portion of the outer ring equivalent member are internally fitted and fixed, and the gap between the inner peripheral surface of the end portion and the outer peripheral surface of the end portion of the inner ring equivalent member is provided over the entire circumference. Tone fixed to the outer peripheral surface of the end portion of the inner ring equivalent member by alternately changing the magnetic characteristics over the circumference in the circumferential direction by a seal ring for closing the inner ring and a magnetic plate, and alternately changing the magnetic characteristics in the circumferential direction. In a rolling bearing unit with a tone wheel including a wheel, a slinger having an L-shaped cross section and an annular shape is formed on an outer peripheral surface of an end of the member corresponding to the inner ring, and an inner diameter formed on an inner peripheral edge of the slinger. The side cylindrical part is externally fitted to the outer peripheral surface of the above end part, and the inner diameter side circle The rotating side circular ring portion bent from the outer end edge of the cylindrical portion is fixed in a state of being projected diametrically outward from the outer peripheral surface of the end portion, and the seal ring is attached to the inner peripheral surface of the end portion of the outer ring equivalent member. A cored bar having an L-shaped cross-section that constitutes the whole of the cored bar has an outer diameter side cylindrical portion formed on the outer peripheral edge thereof fitted into the inner peripheral surface of the end portion from the outer diameter side cylindrical portion. The bent fixed side circular ring portion is fixed in a state in which it projects radially inward from the inner peripheral surface of the end portion at a position axially inward of the rotating side circular ring portion, and is fixed to the fixed side circular ring portion. Is fixed over the entire circumference with a sealing material having a plurality of seal lips that make their respective leading edges slidably contact the slinger, and the leading edge of at least one seal lip is the rotating side circular ring portion. It is in sliding contact with the inner surface of the. On the sides, the rolling bearing with tone wheel unit, characterized in that is affixed fix the locking portion formed on the outer peripheral edge portion by engaging the outer peripheral edge of the rotary side annular portion of the tone wheel.