JPH095346A - Combination of rolling bearing unit with rotational speed detector and sensor removing jig - Google Patents

Abstract

PURPOSE: To separate a cover holding a sensor from an outer ring member while protecting both members against damage and to prevent dimensions of the outer surface of outer ring member from being varied due to presence of a cover. CONSTITUTION: A cover 18a is mounted on an outer ring member 7 by fitting the cylindrical fitting part 31 thereof in the open end part of the outer ring member 7. The turn up part 29 at the outer fringe of the cover 18a projects radially outward from the outer circumferential surface of a step part 32 formed in the outer ring member 7. When the cover 18a is removed from the outer ring member 7, the outer fringe of the turn up part 29 is pressed by means of a sensor removing jig 41 in order to decrease the fastening margin of the cylindrical fitting part 31. Under that state, the cover 18a is removed from the outer ring member 7 together with the sensor removing jig 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Among the combinations of a rolling bearing unit with a rotation speed detecting device and a jig for removing a sensor according to the present invention, a rolling bearing unit with a rotation speed detecting device is used for a wheel of an automobile with respect to a suspension device. It is rotatably supported and detects the rotational speed of this wheel. The sensor removal jig is used to remove the cover supporting the sensor that constitutes the rotation speed detection device for repair or the like.

[0002]

2. Description of the Related Art A vehicle wheel is rotatably supported by a suspension system and the rotational speed of the wheel is detected in order to control an antilock brake system (ABS) or a traction control system (TCS). For this reason, a rolling bearing unit with a rotational speed detecting device as described in, for example, Japanese Patent Laid-Open No. 63-166601 has been conventionally known.

FIG. 5 shows a rolling bearing unit with a rotation speed detecting device described in the above publication. The inner ring equivalent member includes a hub 1 and an inner ring 2. Of these, the outer end portion of the hub 1 (the outer side refers to the side that becomes the outer side in the width direction when mounted on an automobile. The same throughout the present specification. The left side of FIGS. 1, 3, 5, and 6). A flange portion 3 for fixing the wheel is provided, and an inner raceway 4a is formed on the outer peripheral surface of the intermediate portion. The inner ring 2 has an inner ring raceway 4b on the outer peripheral surface,
The hub 1 is externally fitted to the outer peripheral surface of the intermediate portion.

The inside end of the hub 1 (the inside means the side that becomes the center side in the width direction when mounted on an automobile.
Right side of 3, 5 and 6. ) A nut 6 is screwed into the male screw portion 5 formed on the outer peripheral surface. The nut 6 presses the inner end surface of the inner ring 2 as the male thread portion 5 is screwed, and fixes the inner ring 2 at a predetermined position on the outer peripheral surface of the hub 1.

The outer ring-equivalent member 7 has a mounting portion 8 for supporting a suspension device (not shown) formed on an outer peripheral surface, and double-row outer ring raceways 9a and 9b formed on an inner peripheral surface. A plurality of rolling elements 10 and 10 are provided between the outer ring raceways 9a and 9b and the inner ring raceways 4a and 4b, respectively.
The hub 1 is rotatably supported inside the outer ring-corresponding member 7 supported by the suspension device by the mounting portion 8. still,
As the rolling elements 10 and 10, balls as shown in the drawings may be used, and in the case of heavy automobiles, tapered rollers may be used.

A ring-shaped rotor portion 11 is provided on the nut 6, and an uneven portion 12 is formed on the inner surface of the rotor portion 11.
Is formed. The unevenness 12 allows the nut 6
However, it functions as a tone wheel that causes the sensor 14 described below to generate a pulsed output as the hub 1 rotates. The sensor 14 is fixed to the cover 13 fitted and fixed to the inner end opening of the member 7 corresponding to the outer ring, and the outer end surface of the sensor 14 is made to face the uneven portion 12.

In the case of the rolling bearing unit with the rotational speed detecting device as described above, the wheel fixed to the flange portion 3 provided on the outer end portion of the hub 1 is mounted on the suspension device supporting the outer ring equivalent member 7. Can be rotatably supported. Further, when the rotor portion 11 that is screwed into the inner end portion of the hub 1 and is integral with the nut 6 rotates as the wheel rotates, the output of the sensor 14 facing the uneven portion 12 on the inner surface of the rotor portion 11 changes. To do.
The frequency at which the output of the sensor 14 changes is proportional to the rotation speed of the wheel. Therefore, if the output signal of the sensor 14 is input to a controller (not shown), the rotation speed of the wheel is calculated and
S and TCS can be controlled appropriately.

In the conventional rolling bearing unit having the rotational speed detecting device constructed and operated as described above, the member 7 corresponding to the outer ring is used.
On the other hand, the outer end of the cover 13 supporting the sensor 14 is tightly fitted into the inner end opening of the member 7 corresponding to the outer ring. This is to prevent the cover 13 from being accidentally detached from the outer ring-equivalent member 7 due to vibrations generated as the vehicle travels.

However, since the outer ring equivalent member 7 and the cover 13 are tightly fitted to each other as described above, both members 7, 1
It becomes difficult to separate 3. When the members 7, 13 are forcibly separated by prying with a tool such as a screwdriver, the cover 13 is deformed and cannot be reused. Therefore, even if a failure such as a failure occurs in either the rolling bearing portion or the sensor 14 (due to long-term use or the like) after mounting on the vehicle, the non-failed portion is also included. , The entire rolling bearing unit with the rotation speed detection device had to be replaced. Such a situation is not preferable in terms of saving resources as well as causing an increase in repair costs.

[0010] In consideration of such a situation
Japanese Patent Publication No. 4 discloses a rolling bearing unit with a rotation speed detecting device as shown in FIG. A flange portion 3 for fixing a wheel is provided on an outer peripheral surface of an outer end portion of a hub 1 which forms an inner ring equivalent member together with an inner ring 2 described below, and an inner ring raceway 4a and a step portion 15 are provided on an outer peripheral surface of an intermediate portion. Each is formed. Further, on the outer peripheral surface of the hub 1, an inner ring 2 having an inner ring raceway 4b similarly formed on the outer peripheral surface thereof is provided at one end surface (see FIG. 6).
The left end surface of (1) is abutted against the step portion 15 and externally fitted and supported.

Further, a male screw portion 5 is formed on the outer peripheral surface of the inner end portion of the hub 1, and a nut 6 screwed to the male screw portion 5 is tightened to fix the inner ring 2 to the outer peripheral surface of the hub 1. It is fixed to a predetermined part of. By forming the uneven portion 16 on the outer peripheral surface of the nut 6, the nut 6 functions as a tone wheel for detecting the rotation speed. A mounting portion 8 for fixing the member 7 corresponding to the outer ring to the suspension device is provided on the outer peripheral surface of the member 7 corresponding to the outer ring. Further, outer ring raceways 9a and 9b are formed on the inner peripheral surface of the outer ring equivalent member 7 so as to face the inner ring raceways 4a and 4b, respectively. And a pair of inner ring raceways 4a, 4b and a pair of outer ring raceways 9a,
A plurality of rolling elements 10 and 10 are respectively provided between the hub 9 and 9b to allow the hub 1 to rotate freely inside the outer ring equivalent member 7. Further, seal rings 17, 17 are mounted between the inner peripheral surfaces of the inner and outer end portions of the outer ring equivalent member 7 and the outer peripheral surfaces of the hub 1 and the inner ring 2 so that the inner peripheral surface of the outer ring equivalent member 7 and the hub. 1 and the outer peripheral surface of the inner ring 2 and closes the inner and outer end openings of the space in which the plurality of rolling elements 10 and 10 are provided.

On the other hand, the inner end (right end in FIG. 6) opening of the member 7 corresponding to the outer ring is closed by a cover 18. Formed into an annular shape by pressing a metal plate
In order to allow a part of the constant velocity joint to be inserted through the cover 18, the cover 18 is bent at a right angle to the outer peripheral edge portion of the base plate portion 19 formed in a ring shape toward the outside (left side in FIG. 6). It is a cylindrical standing wall 20. Further, on the outer peripheral edge of the outer end opening of the standing wall 20, there is formed a circular ring-shaped step portion 21 which can be abutted against the inner end surface 7a of the outer ring equivalent member 7.

Further, the outer peripheral edge of the stepped portion 21 is bent outward at a right angle to form a fitting cylindrical portion 22 which can be externally fitted to the inner end portion of the outer ring equivalent member 7. Further, the outer end opening of the fitting tubular portion 22 is folded outward 180 degrees in the diametrical direction to form an engaging portion 23 having a large dimension in the diametrical direction. The cover 18 fits the fitting tubular portion 22 onto the inner end portion of the outer ring-equivalent member 7, and the step portion 21.
Is fixed to the outer ring corresponding member 7 by abutting against the inner end surface 7a of the outer ring corresponding member 7. The fitting strength between the fitting tubular portion 22 and the inner end portion of the outer ring equivalent member 7 is set to be sufficiently large so that the outer ring equivalent member 7 and the cover 18 are not separated from each other due to vibration or the like accompanying traveling of the vehicle. There is.
In the cover 18, for example, an electromagnetic sensor 14 is held, and the output of the sensor 14 is sent to a controller (not shown) via a conductor 24.

The rolling bearing unit with a rotation speed detecting device configured as described above rotatably supports the wheel with respect to the suspension device and detects the rotation speed of the wheel fixed to the flange portion 3 of the hub 1. The action itself in doing so is almost the same as that of the rolling bearing unit with the rotational speed detecting device shown in FIG. In particular, in the structure shown in FIG. 6, when it is necessary to separate the outer ring equivalent member 7 and the cover 18 for repair or the like, as shown by a chain line in FIG. The inner peripheral edge portion of the tool 25 having an engaging portion with a crack structure, such as a hand press or pulling out a pulley, is locked to the end edge of the engaging portion 23 formed in the above. And this tool 2
The cover 18 is separated from the outer ring equivalent member 7 by displacing 5 in the direction of separating it from the mounting portion 8, and the cover 18 is pulled out from the outer ring equivalent member 7.

[0015]

In the case of the conventional structure configured as shown in FIG. 6 so that the cover 18 can be removed from the member 7 corresponding to the outer ring, the following problems (1) to (3) are encountered. There is. (1) It is difficult to maintain the accuracy of the outer diameter of a portion of the outer ring-equivalent member 7 that protrudes inward (to the right in FIG. 6) from the mounting portion 8 on the outer peripheral surface. That is, this portion is used for fitting the outer ring corresponding member 7 with a circular hole formed in the knuckle when supporting the knuckle constituting the suspension device, or for attaching a brake component to the outer ring corresponding member 7. It becomes the mating surface.
As shown in FIG. 6, the fitting tubular portion 22 of the cover 18 is provided at this portion.
If the or engagement portion 23 is present, the accuracy of the outer diameter dimension for fitting cannot be maintained. (2) Since the shape of the cover 18 itself is complicated due to the existence of the engaging portion 23 and the like, the processing cost of the cover 18 increases. (3) Since the height of the engaging portion 23 for engaging the tool 25 is only twice the plate thickness of the metal plate forming the cover 18, the engagement allowance between the tool 25 and the engaging portion 23 is not always required. Since the cover 18 cannot be secured sufficiently, the work of removing the cover 18 is still troublesome. The combination of the rolling bearing unit with the rotation speed detecting device and the jig for removing the sensor of the present invention is invented in order to eliminate any such inconvenience.

[0016]

A combination of a rolling bearing unit with a rotation speed detecting device and a sensor removing jig according to the present invention satisfies the following requirements. The rolling bearing unit with a rotation speed detecting device includes an inner ring equivalent member having an inner ring raceway on its outer peripheral surface and rotating during use, an outer ring equivalent member having an outer ring raceway on its inner peripheral surface and not rotating during use, the inner ring raceway and the outer ring. It has a plurality of rolling elements provided between the raceway, a tone wheel fixed to the member corresponding to the inner ring, and a cylindrical portion, and at least a part of the cylindrical portion is provided at the inner end opening of the member corresponding to the outer ring. A metal plate cover fixed to the outer ring equivalent member by being fitted therein, and a sensor supported by the cover and facing the tone wheel are provided. The sensor removing jig connects a holding plate, a circular hole formed in the holding plate into which a part of the cover can be inserted, an outer peripheral edge of the holding plate and an inner peripheral surface of the circular hole. At least one slit, a screw hole and a through hole provided concentrically with each other with the slit sandwiched therebetween, and a bolt having a tip portion screwed into the screw hole and inserted through the through hole.

[0017]

The combination of the rolling bearing unit with the rotational speed detecting device and the sensor removing jig of the present invention configured as described above has the following effects and is as described in (1) to (3) above. It is possible to eliminate such inconvenience. First, as required, in order to fix the cover to the outer ring equivalent member, the opening end of the cylindrical portion is fitted into the inner end opening of the outer ring equivalent member. The dimensions do not change due to the presence of the cover. Therefore, the above-mentioned problem (1) can be solved. Similarly,
Problem (2) can be solved because the shape of the cover is simple. Further, in the sensor removing jig having the structure as required, the width of the slit is narrowed and the inner diameter of the circular hole is reduced based on the tightening of the bolt with respect to the screw hole. Therefore, if the bolt is tightened while a part of the cylindrical portion forming the cover is inserted into the circular hole, the outer diameter surface of the cylindrical portion can be strongly suppressed. In this state where the outer diameter surface of the cover is strongly suppressed by the sensor removal jig, the fitting strength (tightening margin) between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the inner end opening of the outer ring equivalent member Is reduced. Therefore, the cover can be easily removed from the member corresponding to the outer ring by moving the sensor removing jig in a direction away from the member corresponding to the outer ring. Therefore, the above-mentioned problem (3) can be solved.

[0018]

1 and 2 show a first embodiment of the present invention. Outer ring equivalent member 7 having double rows of outer ring raceways on the inner peripheral surface
Is supported by a suspension device by an attachment portion 8 formed on the outer peripheral surface thereof. Inside the outer ring equivalent member 7,
The member 26 corresponding to the inner ring is arranged. This inner ring equivalent member 2
6 has a double row inner ring raceway on its outer peripheral surface facing the outer ring raceway. Of these inner ring raceways, the outer inner ring raceway is formed directly on the outer peripheral surface of the hub 1 forming the inner ring equivalent member 26, and the inner inner raceway of the inner ring 2 fitted onto the outer peripheral surface of the inner end portion of the hub 1. It is formed on the outer peripheral surface. Hub 1 above
The inner ring 2 is fixed to the male screw part 5 formed on the inner end of the inner ring 2 by screwing the nut 6 onto the outer ring 5 to fix the inner ring 2 to the hub 1.

A plurality of rolling elements 10, 10 are provided between the outer ring raceway of the outer ring equivalent member 7 and the inner ring raceway of the inner ring equivalent member 26, and the hub 1 is provided on the inner diameter side of the outer ring equivalent member 7. , Rotatably supported. Hub 1 above
A flange portion 3 (FIG. 5) for fixing a wheel is provided on a portion of the outer end portion of the outer ring corresponding to the outer ring corresponding member 7 protruding from the outer end opening.
~ 6) are provided.

On the other hand, a tone wheel 27 is externally fitted and fixed to a portion of the inner end of the inner ring 2 which is out of the inner ring raceway. The tone wheel 27 is formed by press-molding a magnetic metal plate so that the cross section has a substantially crank shape and the whole is formed in an annular shape. And this tone wheel 2
A large number of notches 28, 28 are formed in the tip portion of 7 at equal intervals in the circumferential direction.

A cover 18a is externally fitted and fixed to the inner end opening of the member 7 corresponding to the outer ring. This cover 18
The a is formed by subjecting the outer peripheral edge of a metal plate formed in a disk shape of a stainless steel plate or the like to plastic working.
That is, the outer peripheral portion of the metal plate is folded back 180 degrees to form a folded portion 29, and the front half of the folded portion 29 is further folded in a direction opposite to the body portion 30 of the metal plate at a right angle to the body portion 30. By being stood, the fitting cylindrical portion 31 which is a cylindrical portion is formed. The outer diameter dimension of the fitting tubular portion 31 in the free state is slightly larger than the inner diameter of the inner end opening of the outer ring equivalent member 7. Therefore, when the fitting tubular portion 31 is opposed to the inner end opening of the outer ring equivalent member 7 and the cover 18a is pressed against the outer ring equivalent member 7, the fitting tubular portion 31 has an elastic diameter. And is pushed into the inner end opening. Then, in the pushed-in state, the outer peripheral surface of the fitting tubular portion 31 and the inner peripheral surface of the inner end opening of the outer ring-equivalent member 7 are strongly brought into contact with each other, and a large frictional force acts between these peripheral surfaces. The separation of the cover 18a from the member 7 corresponding to the outer ring is prevented.

Further, a step portion 32 is formed on the outer peripheral surface of the inner end portion of the member 7 corresponding to the outer ring over the entire circumference. The diameter D ₃₂ of the step portion 32 is smaller than the diameter D _{29 of the} folded portion 29. Therefore, the cover 18a is attached to the member 7 corresponding to the outer ring.
The outer peripheral half of the folded-back portion 29 projects outward in the diametrical direction from the outer peripheral surface of the stepped portion 32 when mounted in the inner end opening. However, the diameter D of the folded-back portion 29
Reference numeral ₂₉ is a part of the member 7 corresponding to the outer ring, which is smaller than the diameter D _{7 of the} inner portion of the mounting portion 8 (D ₇ > D ₂₉ >).
D ₃₂ ). The outer peripheral edge of the folded-back portion 29 and the fitting cylinder portion 31 are concentric with each other. Therefore, the outer peripheral edge of the folded-back portion 29 is a part of the outer ring-corresponding member 7, and is located radially inside the outer peripheral surface (excluding the step portion 32) of the inner portion of the mounting portion 8.

In this way, the sensor 14 is provided inside the cover 18a fitted and fixed to the inner end opening of the member 7 corresponding to the outer ring.
The synthetic resin 33 in which is embedded is held and fixed. And
The outer peripheral surface of the sensor 14 is opposed to the inner peripheral surface of the portion where the notches 28, 28 are formed at the tip of the tone wheel 27 with a minute gap. In the case of the illustrated embodiment, the sensor 14 is formed in an annular shape in order to increase the output change of the sensor 14 due to the rotation of the wheel.
The outer peripheral surface of the sensor 14 and the inner peripheral surface of the tip end portion of the tone wheel 27 are opposed to each other over the entire circumference.
Further, the magnetic resistance between the tone wheel 27 and the sensor 14 is changed at two points simultaneously with the rotation of the tone wheel 27.

Therefore, in the illustrated embodiment, the sensor 1
4 is an annular permanent magnet 34 magnetized in the axial direction (left and right direction in FIG. 1), and a pair of stators 3 made of a magnetic material such as a steel plate and sandwiching the permanent magnet 34 from both sides in the axial direction.
5, 35, and the coil 3 provided in a portion surrounded by the stators 35, 35 and the permanent magnet 34 on three sides.
It is composed of 6 and 6. Short-cylindrical bent portions are formed on the outer peripheral edge portions of both the stators 35, 35. A large number of notches 37, 37 are formed on the outer peripheral edge of each stator 35, 35 including the bent portion in the circumferential direction.
Is formed. The pitch (center angle pitch) of these notches 37, 37 is made equal to the pitch of the notches 28, 28 formed at the tip of the ton wheel 27. The phases of the notches 37, 37 formed in the pair of stators 35, 35 are matched with each other. In order to match the phases of the cutouts 37 with each other in this manner, the bobbin 38 constituting the coil 36 is used in the illustrated embodiment. The bobbin 38 is made of synthetic resin, has a U-shaped cross section with an outer peripheral side opening, and is formed in an annular shape as a whole. The coil 36 is formed by winding a conductive wire around the bobbin 38. The engaging protrusions 39a and 39b are formed at one or a plurality of locations on both the inner and outer side surfaces of the bobbin 38, and the engaging holes 40 are formed at one or a plurality of locations of the pair of stators 35 and 35.
By engaging a and 40b with each stator 35, 35
The phases of the notches 37, 37 formed in the above are matched. In the illustrated embodiment, as described above, the sensor 14 is formed in the annular shape, and the tone wheel 27 and the sensor 14 are formed.
The output of the sensor 14 can be made sufficiently large by adopting a configuration in which the magnetic resistance between and is changed at two locations at the same time.

However, the feature of the present invention is that the work of removing the cover 18a from the member 7 corresponding to the outer ring by the combination with the jig 41 for removing the sensor described below is performed.
In addition, the cover 18a can be easily performed without damaging it. Therefore, the structure of the sensor 14 is not particularly limited. Not only the so-called passive type rotation speed detecting device that changes the voltage induced in the coil 36 according to the change in the density of the magnetic flux passing through the stators 35, as shown in the drawing, but also the so-called active rotation speed detecting device. Can also be used. In the case of using the active type rotational speed detecting device, a permanent magnet having alternating magnetic poles in the circumferential direction is used as a tone wheel, and a magnetic detecting element such as a Hall IC is incorporated in the sensor.

The sensor removing jig 41 includes a pressing plate 42.
Is provided. The restraining plate 42 includes a pair of restraining plate elements 43.
a, 43b. Both of these restraint plate elements 43a, 43
Notches 44 and 44, which are slightly smaller than a semicircle, are formed in the central portions of the portions facing each other at one end edge of b, and these notches 44 and 44 are combined to form a part of the cover 18a. A circular hole 45 into which the certain folded-back portion 29 can be inserted is provided. However, a small-diameter step portion 46 is formed in one half portion (the left half portion in FIG. 1) of the circular hole 45. Step h ₄₆ of the step portion 46, the folded portion height h ₂₉ of the outer peripheral edge protrudes from the outer peripheral surface of the stepped portion 32 formed on the outer ring member 7 of the _{29 (= (D 29 -D 32} ) / 2 ) Is smaller than () (h ₄₆ <h ₂₉ ). Therefore, as shown in FIG. 1, even when the inner peripheral surface of a portion of the circular hole 45 which is dislocated from the step portion 46 and the outer peripheral edge of the folded portion 29 are brought into contact with each other, the both step portions are not contacted. There is a gap between the peripheral surfaces of 46 and 32.

Of the pair of restraining plate elements 43a and 43b, one pair (right side in FIG. 2) of the restraining plate element 43a at both ends of the restraining plate element 43a is separated from the notch 44.
7, 47 are formed in parallel with each other. On the other hand, a pair of through-holes 4 is formed in the other end (left side of FIG. 2) of the restraining plate element 43b at both ends of the restraining plate element 43b.
8 and 48 in parallel with each other and in the screw holes 47 and 4
7 and the same pitch. Both these through holes 48, 48
Is a small diameter portion 49, 49 near the screw holes 47, 47,
The large diameter parts 50, 50 on the side far from the screw holes 47, 47,
The steps 51, 51 are continuous.

When the pair of holding plate elements 43a, 43b are combined to form the holding plate 42, bolts 52, 52 are inserted into the through holes 48, 48 from the large diameter portions 50, 50 side. The male screw portion formed at the tip portion is screwed into the screw holes 47, 47. The inner end surface (the right end surface in FIG. 2) of the head portions 53, 53 of the bolts 52, 52 is the step portion 5 described above.
Abutting on 1, 51. In this state, the holding plate 42 is formed with a pair of slits 54, 54 for connecting the outer peripheral edge of the holding plate 42 and the inner peripheral surface of the circular hole 45.
The width dimension of these both slits 54, 54 and the circular hole 45.
The inner diameter of the can be adjusted by rotating the bolts 52, 52. A square hole (generally a hexagonal hole) is formed in the center of the outer end surface (the left end surface in FIG. 2) of each of the bolts 52, 52.
Is formed, and the tip of a tool (generally, a hexagon wrench) can be engaged with this square hole. Therefore, the above bolts 5
2, 52 can be tightened freely with a strong force.

The rolling bearing unit with a rotation speed detecting device, which constitutes a combination of the rolling bearing unit with a rotation speed detecting device and the jig for removing the sensor according to the present invention configured as described above, has its wheels mounted on the suspension device. While rotatably supporting, the action when detecting the rotation speed of this wheel is
It is almost the same as the above-mentioned conventional rolling bearing unit with a rotation speed detecting device. In the case of the illustrated embodiment, as described above, the sensor 14 is formed in an annular shape, and the magnetic resistance between the tone wheel 27 and the sensor 14 is changed at two locations at the same time. Can be made large enough.

Particularly, in the case of the rolling bearing unit with the rotation speed detecting device which constitutes the combination of the rolling bearing unit with the rotation speed detecting device and the jig for removing the sensor of the present invention, the cover 18a is fixed to the member 7 corresponding to the outer ring. To do
The opening end of the fitting tubular portion 31, which is a cylindrical portion, is connected to the outer ring equivalent member 7
Is fitted in the inner end opening of the. Therefore, the size of the outer diameter surface of the member 7 corresponding to the outer ring does not change due to the presence of the cover 18a. Therefore, it is easy to maintain the accuracy of the outer diameter of the part of the outer ring-equivalent member 7 that protrudes inward (to the right in FIG. 1) from the mounting portion 8 on the outer peripheral surface. Further, since the shape of the cover 18a is relatively simple, the processing cost of the cover 18a is low.

In the case of the combination of the rolling bearing unit with the rotational speed detecting device of the present invention and the sensor removing jig, the sensor removing jig 41 is used for the sensor 1
The cover 18a supporting 4 can be easily removed from the member 7 corresponding to the outer ring. The operation of removing the cover 18a from the outer ring equivalent member 7 using the sensor removing jig 41 is performed as follows.

First, before connecting the pair of restraining plate elements 43a and 43b with the bolts 52 and 52, these restraining plate elements 43a and 43b are folded back 29 of the cover 18a.
Place around Then, the outer peripheral edge of the folded-back portion 29 is opposed to the inner peripheral surface of a portion of the circular hole 45 which is separated from the stepped portion 46. In this state, the bolts 52, 52 are inserted into the through holes 48, 48 formed in the holding plate element 43b.
The bolts 52, 52 are screwed into the screw holes 47, 47 formed in the holding plate element 43a, and further tightened. Based on the tightening of the bolts 52, 52, the width of the slits 54, 54 is narrowed, and the inner diameter of the circular hole 45 is reduced.

In this manner, when the inner diameter of the circular hole 45 is reduced and the outer peripheral edge of the folded-back portion 29 is strongly suppressed by the sensor removing jig 41, the fitting cylindrical portion provided adjacent to the folded-back portion 29. The fitting strength (tightening margin) between 31 and the inner peripheral surface of the inner end opening of the member 7 corresponding to the outer ring is reduced. Therefore, if the sensor removing jig 41 is moved in a direction away from the outer ring equivalent member 7 (rightward in FIG. 1), the cover 1 is removed.
8a can be easily removed from the member 7 corresponding to the outer ring. At this time, the cover 18a and the member 7 corresponding to the outer ring are not damaged.

Next, FIGS. 3 to 4 show a second embodiment of the present invention. In the case of this embodiment, the cover 18b is formed into a bottomed cylindrical shape by drawing a metal plate such as a stainless steel plate. Further, an outward flange-shaped collar portion 56 is formed at a portion of the cylindrical portion 55 forming the outer peripheral wall of the cover 18b near the outer peripheral surface opening end. This collar 56
Is also called a shotgun flange or the like, and is formed by bulging a part of the metal plate forming the cylindrical portion 55 outward in the diameter direction and further crushing it in the axial direction.
When such a cover 18b is attached to the inner end opening of the member 7 corresponding to the outer ring, the flange 56 is formed at the inner end of the cylindrical portion 55.
The portion protruding from is fitted into the inner end opening of the member 7 corresponding to the outer ring. Further, the outer surface of the collar portion 56 is abutted against the inner end surface of the outer ring equivalent member 7.

Further, at the center of the bottom plate portion 57 of the cover 18b, a bottomed cylindrical convex portion 58 is formed concentrically with the cylindrical portion 55. An annular synthetic resin 33 in which the annular sensor 14 is embedded is externally fitted and fixed to the convex portion 58. This sensor 14 is basically the same as the above-described first embodiment, although the cross-sectional shapes of the stators 35, 35 are different. The tone wheel 27 externally fitted and fixed to the inner ring 2 is basically the same as the first embodiment described above, although there are differences in cross-sectional shape.

On the other hand, unlike the above-described first embodiment, the sensor removing jig 41a is composed of one elastic metal holding plate 42a and one bolt 52. A circular hole 45a is formed in the central portion of the pressing plate 42a, and the outer peripheral edge of the pressing plate 42a and the inner peripheral surface of the circular hole 45a are communicated with each other by one slit 54a. A screw hole 47 and a through hole 48 are formed concentrically with each other at a position sandwiching the slit 54a at one end portion (upper end portion in FIG. 4) of the pressing plate 42a. The through hole 48 is formed by connecting the small diameter portion 49 and the large diameter portion 50 by the step portion 51, as in the first embodiment described above. Inner diameter R of the circular hole 45a in the free state of the pressing plate 42a without tightening the bolt 52.
_45a is larger than the outer diameter D ₅₅ of the cylindrical portion 55 when the cover 18b is attached to the outer ring equivalent member 7 (R
_45a > D ₅₅ ). However, when the inner diameter of the circular hole 45a is reduced by tightening the bolt 52 and narrowing the width of the slit 54a, the inner diameter R _45a becomes smaller than the outer diameter D ₅₅ (R _45a <D ₅₅ ). .

In the case of the present embodiment, the cover 18b supporting the sensor 14 by the sensor removing jig 41a is easily removed from the outer ring equivalent member 7 in the following manner.
First, the bolt 52 is loosened, and the inner diameter R of the circular hole 45a is increased.
_{With the} size of _45a enlarged, the sensor removing jig 41a is externally fitted to the cylindrical portion 55 constituting the cover 18b, as shown by the chain line in FIG. Then, the bolts 52 inserted into the through holes 48 are tightened to reduce the width of each slit 54a and reduce the inner diameter R _45a of the circular hole 45a.

In this manner, when the inner diameter R _45a of the circular hole 45a is reduced and the outer peripheral surface of the cylindrical portion 55 is strongly suppressed by the sensor removing jig 41a, the outer peripheral surface of the cylindrical portion 55 at the tip opening and the outer ring. The fitting strength (tightening margin) with the inner peripheral surface of the inner end opening of the corresponding member 7 is reduced. Further, a strong frictional force is generated between the inner peripheral surface of the circular hole 45a and the outer peripheral surface of the cylindrical portion 55. Therefore, the cover 18b can be easily removed from the outer ring-equivalent member 7 by moving the sensor removal jig 41a in a direction away from the outer ring-equivalent member 7 (rightward in FIG. 3). At this time, the cover 18b and the member 7 corresponding to the outer ring are not damaged.

Each of the illustrated embodiments supports a non-driving wheel (a front wheel of an FR vehicle, a rear wheel of an FF vehicle) and a rolling bearing with a rotational speed detecting device for detecting the rotational speed of the non-driving wheel. 1 shows an example of implementing the invention in a unit. However, the present invention is not limited to such a unit for non-driving wheels, but may be a driving wheel as shown in FIG. 6 (a rear wheel of an FR vehicle, a front wheel of an FF vehicle,
It is clear that it can be applied to all wheels of 4WD vehicles.
Further, the structure of the sensor supported inside the cover is not limited to the annular one as in the illustrated embodiment, but may be any of those described in FIGS.
As a matter of course, various known structures such as those having the above structure may be used.

[0040]

The combination of the rolling bearing unit with a rotation speed detecting device and the sensor removing jig of the present invention is constructed and operated as described above to separate the cover holding the sensor from the member corresponding to the outer ring. Can be easily done without damaging the cover. Therefore, when one of the rolling bearing portion and the sensor fails, the parts on the non-failed side can be reused, and the repair cost can be reduced and the resource can be saved. Further, since the dimension of the outer diameter surface of the outer ring equivalent member does not change due to the presence of the cover, it becomes easy to maintain the accuracy of the outer diameter dimension of the outer ring equivalent member. Further, since the shape of the cover is relatively simple, the processing cost of this cover can be low.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a view of the sensor removing jig as viewed from the right side of FIG.

FIG. 3 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

FIG. 4 is a view of the sensor removing jig as viewed from the right side of FIG.

FIG. 5 is a sectional view showing a first example of a conventional structure.

FIG. 6 is a sectional view showing the second example.

[Explanation of symbols]

 1 hub 2 inner ring 3 flange part 4a inner ring raceway 4b inner ring raceway 5 male screw part 6 nut 7 outer ring equivalent member 7a inner end face 8 mounting part 9a outer ring raceway 9b outer ring raceway 10 rolling element 11 rotor part 12 uneven part 13 cover 14 sensor 15 step part 16 Concavo-convex part 17 Seal ring 18, 18a, 18b Cover 19 Substrate part 20 Standing wall 21 Step part 22 Fitting cylinder part 23 Engaging part 24 Conductive wire 25 Tool 26 Inner ring equivalent member 27 Tone wheel 28 Notch 29 Folding part 30 Main body part 31 Fitting cylinder part 32 Step part 33 Synthetic resin 34 Permanent magnet 35 Stator 36 Coil 37 Notch 38 Bobbin 39a, 39b Engagement protrusion 40a, 40b Engagement hole 41, 41a Sensor removal jig 42, 42a Suppression plate 43a, 43b Suppression plate element 44 Notch 45, 45a Circular hole 46 Step portion 47 Screw hole 48 Through hole 49 Small diameter portion 50 Large diameter portion 51 Step portion 52 Bolt 53 Head portion 54, 54a Slit 55 Cylindrical portion 56 Collar portion 57 Bottom plate portion 58 Convex portion

Claims (1)

[Claims] 1. A combination of a rolling bearing unit with a rotation speed detecting device and a sensor removing jig that satisfies the following requirements. The rolling bearing unit with a rotation speed detecting device includes an inner ring equivalent member having an inner ring raceway on its outer peripheral surface and rotating during use, an outer ring equivalent member having an outer ring raceway on its inner peripheral surface and not rotating during use, the inner ring raceway and the outer ring. It has a plurality of rolling elements provided between the raceway, a tone wheel fixed to the member corresponding to the inner ring, and a cylindrical portion, and at least a part of the cylindrical portion is provided at the inner end opening of the member corresponding to the outer ring. A metal plate cover fixed to the outer ring equivalent member by being fitted therein, and a sensor supported by the cover and facing the tone wheel are provided. The sensor removing jig connects a holding plate, a circular hole formed in the holding plate into which a part of the cover can be inserted, an outer peripheral edge of the holding plate and an inner peripheral surface of the circular hole. At least one slit, a screw hole and a through hole provided concentrically with each other with the slit sandwiched therebetween, and a bolt having a tip portion screwed into the screw hole and inserted through the through hole.