JP3480253B2 - Rolling bearing unit with rotation speed detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION A rolling bearing unit with a rotation speed detecting device according to the present invention is used to rotatably support a wheel of an automobile with respect to a suspension device and to detect the rotation speed of the wheel.

[0002]

Rolling bearing units are used to rotatably support the wheels of an automobile relative to a suspension system.
Further, in order to control the antilock brake system (ABS) and the traction control system (TCS), it is necessary to detect the rotation speed of the wheels. For this reason, a rolling bearing unit with a rotation speed detecting device in which a rotation speed detecting device is incorporated in the above rolling bearing unit,
In recent years, it has become widespread to rotatably support the wheel with respect to a suspension device and detect the rotational speed of the wheel.

FIGS. 59 to 60 show an example of a conventional structure of a rotation speed detecting device used for such a purpose as an actual flat blade 7
It shows what was described in the 31539 gazette. This rolling bearing unit with a rotation speed detecting device rotatably supports a hub 2, which is a rotating wheel that rotates during use, inside an outer ring 1, which is a stationary wheel that does not rotate during use.
The rotational speed of the encoder 3 fixed to a part of the hub 2 can be detected by the sensor 4 supported on the outer ring 1. That is, on the inner peripheral surface of the outer ring 1 which is a stationary side peripheral surface, double rows of outer ring raceways 5, 5 each of which are stationary side raceways are provided. Also, the outer peripheral surface of the hub 2, which is the peripheral surface on the side of rotation, and the rotary wheel together with the hub 2 are externally fitted to the hub 2 and fixedly coupled to the hub 2 by the nut 6. Inner ring raceways 8, 8 are provided on the outer peripheral surface of the inner race 7, each of which is a rotation side raceway. A plurality of rolling elements 9 are provided between the inner ring raceways 8 and 8 and the outer ring raceways 5 and 5, respectively.
9 are rotatably provided while being held by retainers 10 and 10, respectively, and the hub 2 and the inner ring 7 are rotatably supported inside the outer ring 1.

Further, the outer end portion of the hub 2 (which is the end portion which is the outer side in the width direction when assembled to an automobile, the right end portion in FIG. 59) projects axially outward from the outer end portion of the outer ring 1. A flange 11 for mounting a wheel is provided on the portion. Further, at the inner end portion of the outer ring 1 (referred to as the end portion on the widthwise center side when assembled to a vehicle, which is the left end portion in FIG. 59), a mounting portion 12 for mounting the outer ring 1 to a suspension device.
Is provided. A gap between the outer end opening of the outer ring 1 and the outer peripheral surface of the intermediate portion of the hub 2 is closed by a seal ring 13. In the case of a rolling bearing unit for an automobile, which is heavy in weight, taper rollers may be used as the plurality of rolling elements 9 instead of the balls as shown.

In order to incorporate the rotational speed detecting device into the rolling bearing unit as described above, the encoder 3 is externally fitted and fixed to the outer peripheral surface of the inner end portion of the inner ring 7 which is out of the inner ring raceway 8. There is. The encoder 3 is formed by subjecting a magnetic metal plate such as a mild steel plate to plastic working to form an annular shape with an L-shaped cross section.
6 is provided, and the cylindrical portion 15 is fixed to the inner end portion of the inner ring 7 by externally fitting the inner end portion of the inner ring 7 by interference fit. Further, the circular ring portion 16 has slit-shaped through holes 1 that are long in the diameter direction of the circular ring portion 16.
By forming a large number of 7 and 17 radially at equal intervals in the circumferential direction, the magnetic characteristics of the annular portion 16 are alternately changed at equal intervals in the circumferential direction.

Further, a cover 18 is fitted and fixed to the inner end opening of the outer ring 1 so as to face the inner side surface of the circular ring portion 16 of the encoder 3. The cover 18, which is formed by plastically processing a metal plate, has a fitting cylinder portion 19 that can be internally fitted and fixed in the inner end opening of the outer ring 1, and a closing plate portion 20 that closes the inner end opening. A bulging portion 21 having a bottomed cylindrical shape is formed in the center of the closing plate portion 20 to prevent interference between the closing plate portion 20 and the nut 6. Further, a through hole 22 is formed in a portion of the closing plate portion 20 near the outer periphery in the diametrical outside of the bulging portion 21.
Through the detection unit 24 of the sensor 4 through the cover 18
Is inserted inside. Further, a mounting flange 25 is fixedly provided on the outer peripheral surface of the intermediate portion of the sensor 4, and the mounting flange 25 is fixed to the closing plate portion 20 of the cover 18 with setscrews 26, 26. 4 is coupled and fixed to the cover 18 in a predetermined positional relationship. With the sensor 4 fixed to the cover 18 in this manner, the tip end surface of the detection portion 24 faces the inner side surface of the circular ring portion 16 that constitutes the encoder 3 with a minute gap.

When the rolling bearing unit with the rotational speed detecting device as described above is used, the mounting portion 12 fixed to the outer peripheral surface of the outer ring 1 is coupled and fixed to the suspension device by a bolt (not shown), and the hub is used. By fixing a wheel to a flange 11 fixedly provided on the outer peripheral surface of 2, by a stud 27 provided on the flange 11, the wheel is rotatably supported by the suspension device. When the wheel rotates in this state, the vicinity of the end face of the detecting portion 24 of the sensor 4 is provided between the through holes 17 and 17 formed in the circular ring portion 16 and the through holes 17 and 17 adjacent to each other in the circumferential direction. The existing pillars pass alternately. As a result, the density of the magnetic flux flowing in the sensor 4 changes, and the output of the sensor 4 changes. The frequency at which the output of the sensor 4 changes in this manner is proportional to the rotational speed of the wheel. Therefore, if the output of the sensor 4 is sent to a controller (not shown), ABS and TCS can be controlled appropriately.

[0008]

In the conventional structure shown in FIGS. 59 to 60, the sensor 4 is fixedly coupled to the cover 18 by a pair of setscrews 26, 26. Therefore, it is troublesome to attach the sensor 4 to the cover 18 at the assembly factory of the rolling bearing unit with the rotation speed detecting device, and it takes a long working time, which causes the cost of the rolling bearing unit with the rotation speed detecting device to increase. Further, for repair or the like, it is troublesome to remove the sensor 4 from the cover 18 and mount it again, which increases the cost required for the repair. In view of such circumstances, the present invention has been devised to realize a structure of a rolling bearing unit with a rotation speed detecting device, which can easily and quickly attach and detach the sensor to and from the cover and reduce costs. is there.

[0009]

A rolling bearing unit with a rotation speed detecting device according to the present invention has a stationary side track on a stationary side peripheral surface, like the conventional rolling bearing unit with a rotating speed detecting device, A stationary wheel that does not rotate even during use, and a rotation-side track on the rotation-side peripheral surface that faces the stationary-side peripheral surface,
A rotating wheel that rotates during use, a plurality of rolling elements that are rotatably provided between the stationary side raceway and the rotating side raceway, and a part of the rotating wheel fixed concentrically with the rotating wheel. Further, the encoder has an encoder in which the characteristics in the circumferential direction are alternately changed at equal intervals, a cover fixed to a part of the stationary wheel in a state of facing the encoder, and a detector. Is supported by a part of the cover in a state of being opposed to a part of the encoder, and changes an output signal in response to a change in characteristics of the encoder.

Particularly, in the rolling bearing unit with a rotation speed detecting device of the present invention, at least a part of the cover facing a part of the encoder is at least the sensor or a holder holding the sensor. An insertion hole is provided so that the portion near the tip can be inserted. Further, at least a part of the sensor or a holder holding the sensor, which is separated from the portion near the tip end, is brought into contact with the peripheral edge portion of the opening of the insertion hole, so that the sensor or the holder holding the sensor is A positioning portion for positioning the insertion hole in the axial direction is provided. An elastic member is provided between the cover and the sensor or a holder holding the sensor to press the positioning portion against the peripheral edge of the opening of the insertion hole, so that the sensor can be attached to and detached from the cover. I am wearing it.

Further, in the rolling bearing unit with the rotation speed detecting device according to the second aspect, the elastic member is a coupling spring formed by bending an elastic wire, and the coupling spring is the holder spring. Outward flange on the
-Like flange is provided on the outer surface of the bottom plate that constitutes the cover.
It is pressed against the end face of the locking cylinder.

Further, in the rolling bearing unit with the rotation speed detecting device according to claim 3, the rolling bearing unit is provided in the holder.
Out of the flange of the outward flange,
The harness is pulled out from the base end surface on the opposite side to the entry part,
The coupling spring is at the base end face of this collar, and from this base end face
Diametrically opposite side with respect to the base end of this harness
It engages with the collar portion at two positions .

Further, in the rolling bearing unit with the rotation speed detecting device according to claim 4, the rolling bearing unit according to claim 2 or
Rolling bearing unit with rotational speed detector described in item 3
In the above, the coupling spring is a wire having elasticity and corrosion resistance.
Composed of wood. Further, the rotation speed detecting device according to claim 5.
A rolling bearing unit according to any one of claims 2 to 4.
In the rolling bearing unit with the rotation speed detection device described in
Where the holder is positioned in the circumferential direction with respect to the cover.
The phase is regulated.

[0014]

The rolling bearing unit with a rotation speed detecting device of the present invention constructed as described above rotatably supports the wheel with respect to the suspension device of the automobile, and the operation itself for detecting the rotation speed of the wheel. Is similar to the case of the conventional structure described above. Particularly, in the case of the rolling bearing unit with the rotation speed detecting device of the present invention, the work of attaching and detaching the sensor to and from the cover can be performed easily and quickly. First, when the sensor is mounted on the cover, the sensor or a portion near the tip of the holder holding the sensor is inserted into the insertion hole, and the positioning portion is brought into contact with the peripheral edge portion of the opening of the insertion hole. Next, the elastic member is mounted between the cover and the sensor or the holder holding the sensor, and the positioning portion is pressed against the peripheral edge portion of the opening of the insertion hole. When removing the sensor from the cover, conversely, after removing the elastic member from between the cover and the sensor or the holder holding the sensor, the portion near the tip of the sensor or the holder holding the sensor is removed. Pull out from the insertion hole. The work of attaching and detaching the elastic member between the cover and the sensor or the holder holding the sensor can be performed easily and quickly as compared with the work of tightening or loosening the set screw. Therefore, it is possible to reduce the labor required for the work of attaching and detaching the sensor or the holder holding the sensor to the cover, and to reduce the cost of the rolling bearing unit with the rotation speed detecting device itself and the cost required for the repair.

[0015]

[0016]

[0017]

[0018]

1 to 5 correspond to claims 1 to 4.
A first example of an embodiment of the present invention is shown. still,
The feature of the present invention resides in the structure of the portion where the sensor is mounted on the cover fixed to the end of the stationary wheel that constitutes the rolling bearing unit. The structure and operation of the rolling bearing unit, which is formed by rotatably supporting the rotating wheel with respect to the stationary wheel, is basically the same as the conventional structure shown in FIGS. The same reference numerals are given to omit or simplify the overlapping description, and the characteristic part of the present invention and the part different from the above-described conventional structure will be mainly described below. In addition, in the drawing showing the embodiment of the present invention, the inside and outside directions with respect to the width direction of the vehicle are opposite to those of FIG. 59 showing the above-mentioned conventional structure.

The inner end of the outer ring 1 which is a stationary wheel (right end of FIG. 1)
The opening is closed by the cover 18a. The cover 18a includes a bottomed cylindrical main body 28 formed by injection molding a synthetic resin, and a fitting cylinder 29 coupled to an opening of the main body 28.
It consists of and. The fitting cylinder 29 is formed by plastically deforming a metal plate having corrosion resistance such as a stainless steel plate, and has an L-shaped cross section as a whole, and has a fitting cylinder portion 30 and a base of the fitting cylinder portion 30. An inward flange portion 31 that is bent inward in the diametrical direction from the edge (the right edge in FIG. 1) is provided. Such a fitting cylinder 29 is joined to the opening of the main body 28 by molding the inward flange 31 at the time of injection molding of the main body 28. It should be noted that the inward flange 31 has a large number of through holes 3
2, 32 are formed intermittently in the circumferential direction.
The synthetic resin forming the main body 28 flows into the inside of each of the through holes 32, 32 at the time of injection molding of the main body 28 to enhance the coupling strength between the main body 28 and the fitting cylinder 29.

The cover 18a having the above-described structure is constructed such that the fitting cylinder portion 30 of the fitting cylinder 29 is fitted onto the inner end portion of the outer ring 1 by interference fitting so that the inner end of the outer ring 1 is fixed. It blocks the opening. In this state, the end surface of the opening of the main body 28, that is, the tip end surface of the cylindrical wall portion 36 formed on the outer peripheral edge of the main body 28 is brought into contact with the inner end surface of the outer ring 1. A locking groove is formed on the front end surface of the cylindrical wall portion 36 over the entire circumference, and the O-ring 33 is locked in the locking groove. When the tip end surface of the cylindrical wall portion 36 and the inner end surface of the outer ring 1 are in contact with each other, the O-ring 33 is elastically compressed between the inner end surface and the bottom surface of the locking groove, Seals the joint between the cover 18a and the outer ring 1,
Foreign matter such as muddy water is prevented from entering the cover 18a.

On the other hand, an encoder 3a is externally fitted and fixed to an inner end portion (a right end portion in FIG. 1) of an inner ring 7 which constitutes a rotating wheel together with the hub 2. The encoder 3a includes a support ring 34 and a permanent magnet 35. Of these, the support ring 34 is S
By bending a magnetic metal plate such as PCC, the whole is formed into an annular shape with an L-shaped cross section, and is fixed to the inner end of the inner ring 7 by interference fitting. Further, the permanent magnet 35 is
For example, rubber mixed with ferrite powder is used as the support ring 34.
It is attached to the inner side surface of the circular ring part constituting the above by baking or the like. The permanent magnets 35 are magnetized, for example, in the axial direction (the left-right direction in FIG. 1) and are changed in the circumferential direction alternately and at equal intervals. Therefore, on the inner surface of the encoder 3a, south poles and north poles are alternately arranged in the circumferential direction at equal intervals.

Further, the main body 28 which constitutes the cover 18a.
The insertion hole 38 is formed in a portion of the bottom plate portion 37 of the above which faces the inner surface of the permanent magnet 35 constituting the encoder 3a.
Are formed in the axial direction of the outer ring 1 with the bottom plate portion 37 penetrating therethrough. A portion of the sensor unit 39 near the tip, which corresponds to the sensor or the holder holding the sensor, is inserted into the insertion hole 38. This sensor unit 39 incorporates a Hall element, a magnetic resistance element (MR element), and the like, a magnetic detection element that changes its characteristics depending on the flow direction of the magnetic flux, and a waveform shaping circuit for adjusting the output waveform of this magnetic detection element. An IC and a magnetic pole piece or the like for guiding a magnetic flux emitted from the permanent magnet 35 (or flowing into the permanent magnet 35) to the magnetic detection element are embedded in a synthetic resin. Further, the end portion of the harness 46 for sending an output signal output from the IC as a shaped waveform to a controller (not shown) is directly connected to the sensor unit 39 (without passing through a connector or the like). Therefore, the connector can be omitted, and the cost of the rolling bearing unit with the rotation speed detecting device can be reduced accordingly.

Such a sensor unit 39 is provided at a portion near the tip (the left end in FIG. 1) and has a cylindrical insertion portion 40 which can be inserted through the insertion hole 38 without rattling, and the base of the insertion portion 40. An outward flange-shaped collar portion 41, which is a positioning portion, is formed at the end portion (right end portion in FIG. 1). While forming a locking groove on the outer peripheral surface of the intermediate portion of the insertion portion 40,
The O-ring 42 is locked in this locking groove. When the insertion portion 40 is inserted into the insertion hole 38, the O-ring 42 is elastically compressed between the inner peripheral surface of the insertion hole 38 and the bottom surface of the locking groove, and the insertion portion 40 is inserted. A seal is provided between the outer peripheral surface of the above and the inner peripheral surface of the insertion hole 38. That is, the O-ring 42 prevents foreign matter such as muddy water from entering the inside of the cover 18a and the outer ring 1 through the insertion hole 38. In this way, the O-ring 33 seals the joint between the stationary outer ring 1 and the cover 18a, and the O-ring 42 seals the insertion portion of the sensor unit 39 with respect to the cover 18a. By preventing foreign matter from entering the bearing unit, the durability of the rolling bearing unit is ensured, and foreign matter such as magnetic powder is prevented from adhering to the side surface of the permanent magnet 35 constituting the encoder 3a to detect the rotation speed. It prevents that the accuracy of is deteriorated. As the seal ring for sealing the insertion portion of the sensor unit 39 with respect to the cover 18a, another seal ring such as an X ring having an X-shaped cross section is used instead of the O ring 42 as described above. Then, the force required to insert the insertion portion 40 of the sensor unit 39 into the insertion hole 38 can be reduced, and the mounting work of the sensor unit 39 can be facilitated.

On the other hand, the outer surface of the bottom plate portion 37 which constitutes the cover 18a (the side surface opposite to the space 43 in which the rolling elements 9, 9 are to be closed, which is to be closed by the cover 18a, as shown in FIG.
A locking cylinder 44 is provided in a part of the right side surface of the insertion hole 38 around the opening of the insertion hole 38. The inner peripheral surface of the locking cylinder 44 forms a single cylindrical surface together with the inner peripheral surface of the insertion hole 38. Therefore, in the case of this example, the opening end surface of the locking cylinder 44 corresponds to the opening peripheral portion of the insertion hole 38.
Further, locking recesses 45, 45 are provided at two positions on the outer peripheral surface of the locking cylinder 44 on the diametrically opposite side, respectively. Each of the locking recesses 45, 45 has a width sufficiently larger than the outer diameter of the wire material forming the coupling spring 47 described below. Then, on each inner side surface, on the inner side surface on the tip side (right side in FIGS. 1 and 4) of the locking cylinder 44, locking grooves 48, 48 having an arcuate cross section are formed over the entire width of the locking recesses 45, 45. Formed over time. The radius of curvature of the cross section of each of the locking grooves 48, 48 is the same as or slightly larger than the radius of curvature of the outer peripheral surface of the wire material forming the coupling spring 47.

The collar portion 41 functioning as a positioning portion provided on the base end portion of the sensor unit 39 has a tip end surface (right end surface in FIGS. 1 and 4) of the locking cylinder 44 formed as described above.
And is connected and fixed to the locking cylinder 44 by a connecting spring 47 described below. This coupling spring 4 which is an elastic member
7 is formed by bending a wire material having elasticity and corrosion resistance, such as stainless spring steel, chrome-plated or zinc-plated spring steel. When a plated wire is used, dehydrogenation is applied to prevent delayed fracture. The coupling springs 47 are parallel to each other at least when assembled to the locking cylinder 44, and the pair of locking legs 4 are parallel to each other.
9, 49, a restraining portion 50 for restraining the collar portion 41 toward the tip end surface of the locking cylinder 44, both end portions of the restraining portion 50, and base end portions of the locking leg portions 49, 49. (Upper right end portion of FIG. 5), and a pair of connecting portions 51, 51 for connecting with. The restraining portion 50 has a U-shaped curved portion 5 at the middle portion.
2 has linear portions 53, 53 at both ends, which are bent in opposite directions from both ends of the curved portion. One end of each of the connecting portions 51, 51 is bent in the same direction from the end of each of the linear portions 53, 53.

In such a coupling spring 47, at least in a state of use, the plane including the pair of locking leg portions 49, 49 and the plane including the restraining portion 50 are parallel to each other.
However, in the free state of the coupling spring 47, the angle of the continuous portion between one end of each of the connecting portions 51 and 51 and the base end portion of each of the locking leg portions 49 and 49 is set so that the distance between these planes is reduced. It gives elasticity in the direction of decreasing. Further, the distance D ₄₉ (FIG. 5) in the free state between the body portions of the pair of locking legs 49, ₄₉ is smaller than the distance D ₄₅ between the locking recesses 45, ₄₅ (FIG. 4). It is small (D ₄₉ <D ₄₅ ). Further, the tips of the pair of locking legs 49, 49 are
Bend them in the opposite directions to each other, and lock both of these locking legs 4
The distance between the tip portions of 9, 49 is set to increase toward the end portions.

On the other hand, on the base end surface of the flange portion 41 provided on the sensor unit 39 (the surface opposite to the insertion portion 40, the right end surface in FIG. 1, the front surface in FIG. 3), the coupling spring 47 is restrained. A holding groove 54 is formed for engaging the portion 50 without rattling. The restraining groove 54 is provided with a curved portion 55 provided so as to surround the base end portion of the harness 46, and straight portions 56 that are bent in opposite directions from both ends of the curved portion 55 and open to the outer peripheral edge of the collar portion 41. , 56 and. Further, an inclined surface 57 is formed on a part of the base end surface of the collar portion 41, which is opposed to the convex side of the curved portion 55. The inclined surface 57 is inclined in a direction in which the thickness of the collar portion 41 decreases toward the end edge of the collar portion 41.

The work of mounting the sensor unit 39 on the cover 18a in order to form the rolling bearing unit with the rotation speed detecting device of the present invention by combining the respective members configured as described above is as follows. Like this.
First, the insertion portion 40, which is a portion near the tip of the sensor unit 39, is inserted into the locking cylinder 44 and the insertion hole 38, and the collar portion 41 is brought into contact with the front end surface of the locking cylinder 44. In this state, a desired thickness dimension (for example, 0.5 mm) is provided between the detection portion provided on the distal end surface of the insertion portion 40 constituting the sensor unit 39 and the inner side surface of the permanent magnet 35 constituting the encoder 3a. The size of each part is regulated so that there is a minute gap. Next, the coupling spring 47 is attached to the cover 1
8a, the locking cylinder 44 and the sensor unit 39
And the flange 41 is pressed against the front end surface of the locking cylinder 44.

As described above, the coupling spring 47 is connected to the cover 1 as described above.
8a, the locking cylinder 44 and the sensor unit 39
The work of mounting between the locking springs and the pair of locking legs 49, 49 forming the coupling spring 47 is performed in the locking recesses 45, 45 of the locking cylinder 44. Insert by inserting from the tip side. Both of these locking legs 49, 49
Since the distance between the tips of the two becomes larger toward the ends, this insertion work can be easily performed. As the insertion work progresses, the linear portions 53, 53 of the restraining portion 50 ride on the inclined surface 57 formed on the collar portion 41. If the insertion work is further continued from this state, the restraining portion 5
0 engages with the holding groove 54 formed on the base end surface of the collar portion 41. During the insertion work, the pair of connecting portions 51,
A part of the part 51 facing the outer peripheral edge of the collar part 41 is
In order not to interfere with the outer peripheral edge of the collar portion 41, a part of the pair of connecting portions 51, 51, which is close to the restraining portion 50, has a space slightly larger than the outer diameter of the collar portion 41. deep.

As described above, the holding portion 50 holds the holding groove 54.
The coupling spring 47 is engaged with the collar portion 41.
Toward the end face of the locking cylinder 44, and pressing it with a sufficiently large force (for example, about 10 kgf), the sensor unit 3
9 is connected to the cover 18a. Also, in this state,
Based on the engagement between the locking legs 49, 49 and the locking grooves 48, 48, and the engagement between the retaining portion 50 and the retaining groove 54, the coupling spring 47 causes the sensor unit 3 to move.
9 and the locking cylinder 44 do not accidentally come off. As a result, the sensor unit 39 is replaced by the cover 18a.
It will not come off from carelessly.

The sensor unit 39 is attached to the cover 18
When removing from a, contrary to the above-described mounting work, first, the coupling spring 47 is removed from between the cover 18a and the sensor unit 39. This detaching operation is performed by first floating the restraining portion 50 from the base end surface of the collar portion 41 and then pulling out the pair of locking leg portions 49, 49 from the locking recessed portions 45, 45. After removing the coupling spring 47 in this manner, the insertion portion 40 of the sensor unit 39 is inserted into the insertion hole 38 and the locking cylinder 44.
Remove from inside.

The work of attaching and detaching the coupling spring 47 between the locking cylinder 44 provided on the cover 18a and the sensor unit 39 is easier and quicker than the work of tightening or loosening the set screw. Can be done. Therefore, according to the present invention including this example, the labor required for attaching / detaching the sensor unit 39 to / from the cover 18a is reduced, and the cost of the rolling bearing unit with the rotation speed detecting device itself and the cost required for the repair are reduced. Can be reduced.

In the above description, the distance D ₄₉ between the pair of locking legs 49, 49 forming the coupling spring 47 in the free state.
A pair of locking recesses 45, 4 provided on the outer peripheral surface of the locking cylinder 44.
The distance is smaller than the interval D _{45 of} 5, and locking grooves 48, 48 are formed in these locking recesses 45, 45. However, if the distance D ₄₉ is made smaller than the distance D ₄₅ ,
The locking grooves 48, 48 do not necessarily have to be provided.
For example, as shown in FIG.
Even if the above-mentioned locking leg portions 49, 49 are formed in a groove shape that can be fitted without rattling, the respective locking leg portions 49, 4
It is possible to prevent 9 from being accidentally disengaged from the locking recesses 45, 45. On the contrary, if the locking grooves 48, 48 are provided, the locking legs 49, 49 do not have to be made smaller than the distance D ₄₅ by the distance D _49. , 45 can be prevented from accidentally coming off. However, in order to sufficiently secure the coupling strength between the cover 18a and the sensor unit 39 by the coupling spring 47 and to facilitate the attachment / detachment work of the coupling spring 47, as shown in FIGS.
The combination of shapes and dimensions shown in 5 is preferred.

Next, FIGS. 6 to 8 correspond to claims 1 and 2.
To show a second example of the embodiment of the present invention. In the case of this example, the locking cylinder 44 formed on the outer surface of the cover 18b
a is composed of a large diameter portion 60 near the base end (toward the left in FIG. 7) and a small diameter portion 61 near to the tip (to the right in FIG. 7). Of these, locking recesses 45a, 45 are provided at two positions on the diametrically opposite side of the outer peripheral surface of the base end side half of the large diameter portion 60, respectively.
a is formed. The widths (dimensions in the left-right direction in FIG. 7) of the locking recesses 45a, 45a are made sufficiently larger than the outer diameter of the wire material forming the coupling spring 47a. On the other hand, the tip and base end portions of the pair of locking leg portions 49, 49 constituting the coupling spring 47a are bent toward the tip end side of the locking cylinder 44a, and the tip end side bent portions 58, 5 are provided.
8 and the base end side bent portions 59, 59 are provided.
Also, one end of each of the connecting portions 51a, 51a is connected to the proximal end side of each of the engaging leg portions 49, 49, and the restraining portion 50 is provided at the other end of each of the connecting portions 51a, 51a. It is provided in a state of being bent in the same direction as the locking legs 49, 49.

The coupling spring 47a as described above loosely engages the locking legs 49, 49 with the inside of the locking recesses 45a, 45a, and bends the tip end side bent portions 5 respectively.
A notch formed by aligning 8, 58 with one end portion (upper end portion of FIGS. 6 to 7) of each locking recess 45a, 45a on a part of the outer peripheral surface of the tip side half of the large diameter portion 60. Parts 62, 6
2 is engaged. In addition, each of the above-mentioned bent portions 5
The tips of 8, 8 are slightly bent to the side of the locking legs 49, 49, and this bent portion is the large diameter portion 60.
It is locked to the tip surface of. In this state, the coupling spring 47 is
The a is swingably supported on the side portion of the locking cylinder 44a. Further, with the swing, the restraining portion 50 can move back and forth toward the opening of the locking cylinder 44a, which also serves as the opening of the insertion hole 38. It should be noted that the coupling spring 47a swings to the state shown by the chain line in FIGS. The portion 50 retracts from the opening of the locking cylinder 44a.

The sensor unit 39, which is coupled to the locking cylinder 44a configured as described above by using the coupling spring 47a configured as described above, is the same as that of the first example shown in FIGS. It has the same configuration. Such a sensor unit 39
6 to hold and fix the inside of the locking cylinder 44a.
As shown by the chain line in FIG.
The sensor unit 3 is retracted from the opening a.
The insertion portion 40 of No. 9 is inserted into the inside of the locking cylinder 44a and into the insertion hole 38, and the collar portion 41 is brought into contact with the tip end surface of the locking cylinder 44a. Next, the restraining portion 50 is pressed upward as shown by an arrow α in FIGS. 6 to 7 to engage the restraining portion 50 with the restraining groove 54 formed on the base end surface of the collar portion 41 (sensor). Regarding each component of the unit 39, FIG.
3). On the contrary, when removing the sensor unit 39 from the cover 18b, the restraining portion 50 is displaced in the direction opposite to the arrow α, and the restraining portion 50 is retracted from the opening of the locking cylinder 44a. The insertion portion 40 of the sensor unit 39 is pulled out from the inside of the locking cylinder 44a and the insertion hole 38. Also in the case of the present example configured and operated as described above, the labor required for attaching / detaching the sensor unit 39 to / from the cover 18a is reduced,
The cost of the rolling bearing unit itself with a rotation speed detector,
In addition, the cost required for repair can be reduced.

Next, FIGS. 9 to 11 correspond to claims 1 and 2.
To respond shows a third example embodiment of the present invention. In the case of this example, the locking cylinder 44 provided on the outer surface of the cover 18c
A pair of straight side portions 6 parallel to each other are provided on the outer peripheral edge of the tip portion of b.
A collar portion 64 having 3, 63 is formed. In the case of this example, a portion between the outer surface of the cover 18c and one surface of the collar portion 64 has locking legs 49, 4 of a coupling spring 47b described later.
The engaging recesses 45b, 45b for engaging 9 are formed.
Further, a pair of inclined side portions 65, 65 is formed at one end portion (left end portion in FIG. 9) of the collar portion 64 so that the width of the collar portion 64 becomes smaller toward the one end edge. . Further, first locking notches 66, 66 and second locking notches 67, 67 are formed at two positions on each of the straight side portions 63, 63 so as to be aligned with each other. . Of these, the first locking notch 6 provided on the side of the inclined sides 65, 65
One side edge of the second locking cutouts 67, 67 of 6, 66 is inclined toward the second locking cutouts 67, 67 toward the end edge of the collar portion 64. .
Further, the width of the portion that partitions one side surface (the right side surface in FIG. 9) of the second locking notches 67, 67 at the other end portion (the right end portion in FIG. 9) of the collar portion 64 is the same as that of the adjacent first , The width of the portion between the second locking notches 66, 67 is made larger.

On the other hand, the coupling spring 47b for coupling and fixing the sensor unit 39 (see FIGS. 1 and 3) to the cover 18b as described above has a pair of locking leg portions 49, 49 and a pair of engagement legs. The retaining legs 49, and a restraining portion 50 provided so as to be bridged between the retaining legs 49. Both ends of the restraining portion 50 and the tip portions of the pair of locking leg portions 49, 49 (the left end portion in FIG. 9,
The left lower end portion of FIG. 11) means curved connecting portions 51b, 51
It is connected by b. Each of these connecting portions 51b, 51b
Has elastic force in a direction in which both ends of the restraining portion 50 and the pair of locking leg portions 49, 49 are brought close to each other in a free state.

Further, at the base end portions (the right end portion in FIG. 9 and the upper right end portion in FIG. 11) of the engaging leg portions 49, 49, the collar portion 6 is formed.
Bending locking parts 68, 68 bent toward 4
Is formed. In the illustrated example, the distance between the pair of bent locking portions 68, 68 is set to the above-mentioned pair of locking leg portions 4.
It is made larger than the interval of 9, 49. The reason for this is that the locking legs 49, 49 and the locking recesses 45b, 45 are formed.
While securing the engagement depth with b and the coupling strength of the sensor unit 39 by the coupling spring 47b, each of the bent locking portions 68, 68 and the first and second locking notches. This is to prevent the locking force between 66 and 67 from becoming excessively large.

The coupling spring 47b having the above-described shape is supported by the locking cylinder 44b so as to be movable in parallel along the straight side portions 63, 63. In this state, the suppressing section 50
With this parallel movement, can move back and forth toward the opening of the locking cylinder 44b, which also serves as the opening of the insertion hole 38.
It should be noted that the sensor unit 39, which is actually installed in an automobile,
In the state in which is not attached, the coupling spring 47b is in a state in which the respective bent engaging portions 68, 68 and the first engaging cutouts 66, 66 are engaged with each other as shown by a chain line in FIG. The retaining portion 50 is retracted from the opening of the locking cylinder 44b. From the manufacturer of the rolling bearing unit with the rotation speed detection device to the automobile assembly plant, the bending locking portions 68, 68 and the first locking notches 66, 66 are engaged with each other in this manner. Will be delivered in the closed condition.
In such a state, the coupling spring 47b causes the cover 18 to
It does not project diametrically outward from the outer peripheral surface of c. Therefore, the coupling spring 47b does not interfere with the work of supporting the rolling bearing unit with the rotation speed detecting device on the suspension device of the automobile while inserting the cover 18c into the support hole of the knuckle (not shown).

The sensor unit 39 which is coupled to the locking cylinder 44b configured as described above by using the coupling spring 47b also configured as described above is the first unit shown in FIGS.
The configuration is the same as in the example. To hold and fix such a sensor unit 39 inside the locking cylinder 44b,
As shown by the chain line in FIG. 9, the retaining portion 50 is attached to the locking cylinder 44.
In the state of being retracted from the opening of b, the insertion portion 40 of the sensor unit 39 is inserted into the inside of the locking cylinder 44b and into the insertion hole 38, and the collar portion 41 of the sensor unit 39 is inserted.
Is brought into contact with the front end surface of the locking cylinder 44b. Next, the restraining portion 50 is pressed rightward (diametrically outward) in FIG. 9 to engage the restraining portion 50 with the restraining groove 54 formed on the base end surface of the collar portion 41 (sensor unit). For each component of 39, refer to FIGS. In this way, the suppressing part 5
0 and the holding groove 54 are engaged with each other, the bent engaging portions 68, 68 and the second engaging cutouts 67,
67 is engaged.

When the sensor unit 39 is coupled and fixed to the cover 18c by the coupling spring 47b as described above, the bent engagement portions 68, 68 are provided with the first engagement notches 66, 66. To the second locking notches 67, 67 described above. In the case of the structure of this example, this movement can be easily performed because one side edge of each of the first locking notches 66, 66 is inclined. In addition, the collar portion 6
The width of the other end portion of 4 is larger than the width of the portion between the adjacent first and second locking notches 66 and 67.
The bent locking portions 68, 68 do not pass over the second locking notches 67, 67.

When removing the sensor unit 39 from the cover 18c, the coupling spring 47b is displaced to the left in the figure to the state shown by the chain line in FIG. 9, contrary to the mounting operation. Let In the work of displacing the coupling spring 47 in this way, the restraining portion 50 is floated from the base end surface of the collar portion 41, and each of the bending locking portions 6 is
This is performed while widening the interval between 8 and 68. In this way, the holding section 50 is retracted from the opening of the locking tube 44b, and then the insertion section 40 of the sensor unit 39 is pulled out from the inside of the locking tube 44b and the insertion hole 38. Also in the case of the present example configured and operated as described above, the labor required for attaching and detaching the sensor unit 39 to and from the cover 18c is reduced, and the cost and repair of the rolling bearing unit with a rotation speed detecting device are performed. It is possible to reduce the cost required for.

Next, FIG. 12 to 16, claims 1 to 3,
The 4th example of embodiment of this invention corresponding to 5 is shown. In the case of this example, the locking cylinder 4 formed on the cover 18d
4c, the sensor unit 39a, a pair of coupling springs 47
c and 47c are used to bond and fix. For this reason, a set of two pivot support pieces 72, 72 are provided at two locations on the diametrically opposite sides of a part of the outer peripheral surface of the locking cylinder 44c.
Are formed at intervals for each set. Each of the pivot support pieces 72, 72 is formed in an arch shape, and the pivot support portions 73, 73 formed at both ends of each coupling spring 47c described below are pivotally supported inside the respective pivot support pieces 72, 72 so as to be swingable. I am trying. It should be noted that the set of the pivot support pieces 72, 72 is a pair of connecting springs 47c, 4c pivotally supported by the pivot support pieces 72, 72 of the set.
Of the outer peripheral surface of the locking cylinder 44c, the locking cylinder 4c is provided so that the locking member 7c does not interfere with other components due to the swing.
4c is provided on the opposite side surface in the circumferential direction.

As shown in FIG. 15, the pair of coupling springs 47c and 47c are formed by bending the linear restraining portion 50a and the pair of pivotally supporting portions 73 and 73 into a dogleg shape. The elastic legs 74, 74 are connected to each other.
These elastic leg portions 74, 74 elastically deform in the extension direction when a force in the pulling direction is applied, and the restraining portion 50a is formed.
And the above-mentioned pivotal support portions 73, 73 are allowed to separate from each other. In addition, the direction of the pair of pivotally supporting portions 73, 73 provided at both ends of each of the coupling springs 47c, 47c is as follows.
3 and 73 are inclined with respect to each other in accordance with the directions of the respective pivot support pieces 72 and 72 to be pivotally supported. In addition, the distance D between the tip portions of the pair of pivotally supporting portions 73, 73 in the free state
₇₃ is sufficiently larger than the distance D ₇₂ between the pair of pivot support pieces 72, 72 forming one set (D ₇₃ > D ₇₂ ).

On the other hand, on the base end surface of the collar portion 41a constituting the sensor unit 39a, the restraining grooves 54 parallel to each other are provided.
The a and 54a are formed so as to sandwich the harness 46. The restraining portions 50a and 50a of the coupling springs 47c and 47c can be engaged with the restraining grooves 54a and 54a without rattling. Further, at the diametrically opposite positions of the base end surface of the collar portion 41a, inclined surfaces 57a, 57 are provided in the portions closer to the outer peripheral edge than the restraining grooves 54a, 54a, respectively.
By forming a, the thickness of the collar portion 41a is made smaller from the restraining grooves 54a, 54a toward the end edge of the collar portion 41a.

In order to hold and fix the sensor unit 39a as described above inside the locking cylinder 44c, the pivotally supporting portions 73, 73 of the pair of coupling springs 47c, 47c are respectively set in advance in the above-described manner. The support pieces 72, 72 are engaged with each other.
This engagement work can be easily performed in a wide space. And
The pair of coupling springs 47c and 47c are connected to the locking cylinder 44c.
By oscillating and displacing to the side of each of these coupling springs 47c, 47
With the restraining parts 50a, 50a of c retracted from the opening of the locking cylinder 44c, the insertion part 40 of the sensor unit 39a is inserted into the locking cylinder 44c and into the insertion hole 38, and the collar is inserted. The portion 41a is brought into contact with the tip end surface of the locking cylinder 44c. In this state, the sensor unit 39a
The size of each part is regulated so that a minute gap having a desired size exists between the detection part provided on the distal end surface of the insertion part 40 that constitutes the above and the inner side surface of the circular ring part 16 that constitutes the encoder 3. ing. Then, the pair of coupling springs 47c, 47c
The respective restraining portions 50a, 50a to the collar portion 41a.
The respective restraining portions 50a, 50a are engaged with the pair of restraining grooves 54a, 54a formed on the base end surface of the collar portion 41a by swinging and displacing the restraining portions 50a, 50a. On this occasion,
The restraining portions 50a, 50a and the inclined surfaces 57a, 5
Based on the engagement with 7a, the elastic legs 74, 74 elastically extend. Then, each of the restraining parts 50a, 50a
And the holding grooves 54a, 54a are aligned, the elastic legs 74, 74 are elastically contracted over their entire lengths, and the holding portions 50a, 50a and the holding grooves 54a, 54a remain engaged. It becomes a state.

When the sensor unit 39a is removed from the cover 18d, the connecting springs 47c and 47c are attached to the locking cylinder 44, as opposed to the mounting operation.
The coupling springs 47c, 4c
7c, the holding portions 50a, 50a are connected to the holding grooves 54a, 5a.
Remove from 4a. In this way, the above-mentioned restraining portions 50a, 50
a is removed from the holding grooves 54a, 54a, and the holding portions 50a, 50a are retracted from the opening of the locking cylinder 44c, and then the insertion portion 40 of the sensor unit 39a is locked in the locking cylinder 44c. It is pulled out from the inside and the insertion hole 38. Also in the case of the present example which is constructed and operates as described above, the sensor unit 39b is attached to the cover 18d.
It is possible to reduce the labor required for the attachment and detachment work, and to reduce the cost of the rolling bearing unit with a rotation speed detecting device itself and the cost required for repair.

In the case of this example, the encoder 3 similar to the one incorporated in the conventional structure shown in FIG. is doing. Particularly, in the case of the structure of the present example, a small-diameter stepped portion 69 is formed concentrically with the inner ring 7a at the inner end portion of the inner ring 7a axially offset from the inner ring raceway 8. ing. Then, the cylindrical portion 15 constituting the encoder 3 is externally fitted and fixed to the step portion 69. The reason for forming such a stepped portion 69 is that the encoder 3 and the distal end surface of the insertion portion 40 constituting the sensor unit 39a are opposed to each other without increasing the diameter of the cover 18d.

That is, even if a large thrust load or moment load is applied to the rolling bearing unit, the rolling elements 9 are prevented from coming off the inner ring raceway 8 provided on the outer peripheral surface of the inner ring 7a. A shoulder portion 70 having a sufficiently large outer diameter needs to be formed at a portion of the inner end portion of the inner race 7a that is axially displaced from the inner raceway 8. On the other hand, the inner ring 7
In order to detect the rotation speed of the rotating wheel including a, it is necessary to make the circular ring portion 16 configuring the encoder 3 and the tip end surface of the insertion portion 40 face each other. When the cylindrical portion 15 constituting the encoder is externally fitted to the shoulder portion 70 itself, the diameter of the circular ring portion 16 becomes larger than necessary, and the cover 1 for supporting and fixing the sensor unit 39a facing the circular ring portion 16 is provided.
The diameter of 8d may become larger than necessary. On the other hand, if the stepped portion 69 as described above is provided and the encoder 3 is externally fitted and fixed to the stepped portion 69, it is possible to prevent the diameter of the encoder 3 and the cover 18d from becoming larger than necessary. This can contribute to the realization of a small rolling bearing unit with a rotation speed detection device. Needless to say, such a structure is not limited to this example and can be applied to other embodiments.

Further, in the case of the illustrated example, the hub 2a
A cylindrical portion 71 is formed at the inner end of the inner ring 7a, and a portion of the inner ring 7a protruding from the inner end surface of the inner cylindrical portion 71 is caulked outwardly in the diametrical direction to expand the inner ring 7a relative to the hub 2a. Bonded and fixed. If such a structure is adopted, as compared with the conventional structure shown in FIG. 59 or the structure in which the inner ring and the hub are coupled and fixed with a nut like the first example of the embodiment shown in FIG. As a result, the cost can be reduced by reducing the number of parts and assembling labor. When the tip portion of the cylindrical portion 71 is swaged outward in the diametrical direction, a force directed in the diametrically outward direction is applied to a part of the inner ring 7a. When this load is large, it is conceivable that the diameter of the inner ring raceway 8 changes and the preload applied to the rolling elements 9, 9 changes. However, in the case of this example, the step portion 69 receives the force associated with the caulking and the force is hardly applied to the inner ring raceway 8 portion. Therefore, the preload hardly changes. Such a structure can also be applied to other embodiments.

In the case of this example, an example in which the encoder 3 is made of a magnetic material and the circular ring portion 16 is formed with a plurality of slit-shaped through holes 17 has been described. Therefore,
The structure of the sensor incorporated in the sensor unit 39a is also
It is different from the one that uses a permanent magnet as an encoder. However, the structure and operation of such a sensor are well known in the related art and are not related to the gist of the present invention, and thus detailed description thereof will be omitted. When an MR element is used for the sensor, it is necessary to regulate the array direction of the MR element in relation to the longitudinal direction of the through hole 17 (diameter direction of the circular ring portion 16). In the case of this example, since the direction of the sensor unit 39a with respect to the cover 18d can be regulated by the engagement of the respective restraining portions 50a, 50a and the respective restraining grooves 54a, 54a, no special positioning means is provided. However, the arrangement direction of the MR elements can be restricted in relation to the longitudinal direction of the through holes 17.

Next, FIGS. 17 to 20 relate to claims 1 and 2.
The corresponding 5th example of embodiment of this invention is shown.
In the case of this example, a pair of engagements for communicating the inner and outer peripheral surfaces of the locking cylinder 44d, which are slit-shaped, are formed at positions on the diametrically opposite side of a part of the locking cylinder 44d provided on the cover 18e. The stop holes 75, 75 are formed. On the other hand, locking grooves 76, 76 are provided at diametrically opposite positions in a part of the insertion portion 40 constituting the sensor unit 39b. Then, the base end portion of the sensor unit 39b (see FIGS.
9 with the collar portion 41b provided at the right end portion 9 and the tip end surface of the locking cylinder 44d in contact with each other, the locking holes 75, 75.
The locking grooves 76 and 76 are substantially aligned with each other with a slight deviation in the axial direction. That is, in this state, the locking grooves 76, 76 are locked in the locking holes 7.
The dimensions of the respective parts are regulated so that they are located closer to the tip end surface of the locking cylinder 44d (rightward in FIGS. 17 to 18) than the number of 5, 75.

As shown in FIG. 20, the coupling spring 47d for coupling and fixing the sensor unit 39b to the locking cylinder 44d formed on the cover 18e as described above, as shown in FIG. It has a corrugated leaf spring. When the sensor unit 39b is coupled and fixed to the locking cylinder 44d, first, the insertion portion 40 constituting the sensor unit 39b is inserted into the locking cylinder 44d, and the locking cylinder 44d is inserted.
The front end surface of the and the collar portion 41b are brought into contact with each other, and the engaging holes 75, 75 and the engaging grooves 76, 76 are partially aligned. Then, in this state, each of the locking holes 75,
The coupling spring 47d between the locking groove 76 and the locking groove 76,
Is inserted while elastically reducing the thickness dimension of the coupling spring 47d. These locking holes 75, 75 and locking grooves 76, 7
The coupling spring 47d inserted between the locking springs 75 and 75 includes distal end side inner surfaces 77 and 77 and distal end side inner surfaces 78 and 78 of the locking grooves 76 and 76, respectively. It is stretched between them, and elastic force is applied to the insertion portion 40 of the sensor unit 39b in the direction of pulling it inside the locking cylinder 44d.
In the case of such a structure of this example as well, the sensor unit 39b
It is possible to reduce the labor required for the work of attaching and detaching the cover 18e to and from the cover 18e, and to reduce the cost of the rolling bearing unit with the rotation speed detection device itself and the cost required for repair.

Next, FIGS. 21 to 24 correspond to claim 1 .
To show a sixth embodiment of the present invention. In each of the above-mentioned examples, the present invention is applied to the rolling bearing unit for supporting the non-driving wheels (the rear wheels of the FF vehicle, the front wheels of the FR vehicle), while the present example and the later-described In the case of 7 cases, drive wheels (front wheel of FF car, rear wheel of FR car, 4WD
The present invention is applied to a rolling bearing unit for supporting all wheels of a vehicle. For this reason, in the case of this example, a cylindrical hub having a spline hole 79 through which the shaft of a constant velocity joint can be inserted is used as the hub 2b. Further, in order to prevent interference with the constant velocity joint, the cover 18f
Is formed in an annular shape, and the sensor unit 39c is arranged in the diameter direction of the cover 18f.

Therefore, in the case of this example, the cover 18 is
An eave-shaped mounting flange portion 80 is formed on a part of the outer surface of f,
An insertion hole 38a is formed in the mounting flange portion 80 in the diameter direction of the cover 18f. In the case of this example, the sectional shape of the insertion hole 38a is a quadrangle. Further, the engaging groove 48 is formed on the inner peripheral side surface of the tip end portion of the mounting flange portion 80.
a is a locking hole 81 at the base end of the mounting flange 80.
Are formed in the circumferential direction of the cover 18f. Further, the sensor unit 39c has an insertion portion 40a having a quadrangular cross section and an outward flange shape provided at the base end portion of the insertion portion 40a so that the sensor unit 39c can be inserted into the insertion hole 38a without rattling. And a collar portion 41. Then, the holding groove 54 and the inclined surface 57 are formed on the base end surface of the collar portion 41 as in the case of the first example described above. The detection section facing the inner side surface of the permanent magnet 35 constituting the encoder 3a is the outer side surface of the distal end portion of the insertion section 40a (see FIG. 21).
It is provided on the left side surface of the lower end of the.

On the other hand, a coupling spring 47e for coupling and fixing the sensor unit 39c to the mounting flange portion 80.
Is provided with a pair of locking leg portions 49, 49, and a restraining portion 50 provided so as to be bridged between the pair of locking leg portions 49, 49. The both end portions of the restraining portion 50 and the one end portions of the pair of locking leg portions 49, 49 have a curved connecting portion 51.
It is connected by c and 51c. Each of these connecting portions 51
c and 51c have elasticity in a direction in which both ends of the restraining portion 50 and the pair of locking leg portions 49 and 49 are brought close to each other in a free state. Further, the respective locking leg portions 49, 49 are linearly formed to the respective tip portions.

In order to hold and fix the sensor unit 39c on the mounting flange portion 80 having the above-described structure by using the connecting spring 47e having the above-described structure, the connecting spring 47e is removed. The sensor unit 3
The insertion portion 40a of 9c is inserted into the insertion hole 38a of the mounting flange portion 80 from the outside in the diametrical direction to the inside. Then, the collar portion 41 is brought into contact with the outer peripheral side surface of the mounting flange portion 80. Next, while widening the distance between the pair of locking leg portions 49, 49 and the restraining portion 50 forming the coupling spring 47e, these locking leg portions 49, 49 are fitted into the locking groove 48a and the locking hole 81. Engage or insert and hold down part 5
0 is mounted on the base end surface of the collar portion 41. And
The restraining portion 50 and the restraining groove 54 formed on the base end surface of the collar portion 41 are engaged with each other.

Also in the case of the structure of this example as described above, the labor required for attaching and detaching the sensor unit 39c to and from the cover 18f can be reduced, and the cost of the rolling bearing unit with the rotation speed detecting device itself and the repair can be improved. The cost required can be reduced. In the case of the structure of this example, the seal ring 82 is fitted and fixed to the inner peripheral surface of the inner end portion of the outer ring 1, and the support ring 34 that constitutes the seal ring 82 and the encoder 3a.
The combination of and constitutes a seal ring, and the rolling element 9,
A foreign substance is prevented from entering the space 43 in which the 9 is installed.

Next, FIGS. 25 to 30 correspond to claim 1 .
To show a seventh embodiment of the present invention. In the case of this example, the main body 28a made of synthetic resin that constitutes the cover 18g is formed in an L-shaped cross section over the entire circumference. Then, a part of the cylindrical wall portion 36a constituting the cover 18g is made thick, and an insertion hole 38b is formed in the thick portion in the diameter direction of the cover 18g. In the case of this example, the insertion hole 38b and the insertion portion 40b which constitutes the sensor unit 39d and is inserted into the insertion hole 38b.
The cross-sectional shape of each is circular.

In this way, the insertion hole 38b and the insertion portion 40b
Instead of having a circular cross-sectional shape, the collar portion 41c provided at the base end portion of the sensor unit 39d in the present example.
And the stepped portion 87 formed in the intermediate portion of the cylindrical wall portion 36a of the cover 18g, the sensor unit 39
The rotation of d is being stopped. That is, the collar portion 41c is formed into a substantially D shape, a flat surface 83 is formed on a part of the outer peripheral edge of the collar portion 41c, and the insertion portion 40b is inserted into the insertion hole 38b. The step portion 87 and the flat surface 83 are brought into close contact with or close to each other. In the case of the present example, by providing such a flat surface 83, the rotation of the sensor unit 39d is prevented, and at the same time, the size of the axial direction (left and right direction in FIG. 25) required for installing the sensor unit 39d is set. I am trying to save money. Further, the holding groove 54 and the inclined surface 57 similar to those in the above-described first to third examples and the above-described sixth example are formed on the base end surface of the collar portion 41c as described above. The sensor unit 39d is attached to the cover 18
In the state of being coupled and fixed to g, the retaining portion 50b of the coupling spring 47f described below engages with the retaining groove 54, and the collar portion 41
C is held down on the outer peripheral surface of the cylindrical wall portion 36a.

The coupling spring 47f used in this example is composed of the above-mentioned restraining portion 50b provided at the center portion and the pivoting locking leg portions 49a, 49a provided at both end portions, and a substantially quadrant connecting portion. 51
They are connected by d and 51d. Each locking leg 49
Reference characters a and 49a are bent in opposite directions from the end portions of the connecting portions 51d and 51d, which are both end portions of the coupling spring 47f, and are arranged coaxially with each other. In order to pivotally support the locking legs 49a and 49a, the insertion hole 3 is formed at a part of the outer surface of the step 87 of the cover 18g.
A hook-shaped pivotal support portion 84 is formed at each of two positions on the diametrically opposite side with respect to 8b. The coupling spring 4
In the free state of 7f, the distance D _49a between the tips of the locking legs 49a, 49a is sufficiently larger than the distance D ₈₄ (not shown) between the pair of pivotally supporting portions 84 (D _49a > D
₈₄ ). Further, each of these pivotally supporting portions 84 is open only on the side opposite to the insertion hole 38b. Therefore, when the locking legs 49a and 49a are locked to the pivotally supporting portions 84, the locking legs 49a and 49a are inserted into the insertion hole 3
It does not shift to the 8b side. In addition, each of the locking leg portions 49a,
The pivot portion for pivotally supporting 49a is not limited to the hook shape as shown in the drawing, but may be a gate shape, a hole shape or the like.

A locking hook 85 for locking the restraining portion 50b is provided at a portion of the outer surface of the bottom plate portion 37a of the cover 18g which is aligned with the insertion hole 38b. It is formed integrally when injection molding is performed with synthetic resin. The coupling spring 47f is a manufacturer of rolling bearing units, and is attached to the cover 18g in the state shown in FIG. That is, each locking leg portion 49
The a and 49a are locked to the pivotal supporting portions 84, and the restraining portion 50b is locked to the locking hook 85. In this state, the suppressing portion 50b does not hinder the withdrawal from the opening of the insertion hole 38b and the insertion of the insertion portion 40b constituting the sensor unit 39d into the insertion hole 38b. In this state, the coupling spring 4
7f does not project diametrically outward from the outer peripheral surface of the cover 18g. Therefore, the coupling spring 47f does not interfere with the work of supporting the rolling bearing unit with the rotation speed detecting device on the suspension device of the automobile while inserting the cover 18g into the supporting hole of the knuckle (not shown). still,
An inclined edge 86 is formed on a part of the locking hook 85,
The retaining portion 50b is adapted to be easily engaged with the retaining hook 85. In the illustrated example, the locking hook 85 is engaged with the U-shaped curved portion 52a of the coupling spring 47f. However, it is also possible to engage the locking hook with a pair of linear portions 53a, 53a provided so as to sandwich the curved portion 52a. In this case, a pair of locking hooks are provided at intervals.

When the sensor unit 39d is held and fixed to the cylindrical wall portion 36a constituting the cover 18g configured as described above by using the coupling spring 47f also configured as described above, this coupling spring 47f is used. As shown in FIG. 29, the restraining portion 50b is retracted from the insertion hole 38b. Then, in this state, the insertion hole 3 in which the insertion portion 40b of the sensor unit 39d is formed in the cylindrical wall portion 36a.
8b is inserted from the outside in the diametrical direction to the inside. Then, the collar portion 41c is brought into contact with the outer peripheral surface of the thick portion of the cylindrical wall portion 36a, and the step portion 87 and the flat surface 83 are brought into close contact or close proximity. Then, the coupling spring 47
The restraining portion 50b of f is removed from the locking hook 85, and the coupling spring 47f is swung in the counterclockwise direction in FIG.
0b is mounted on the base end surface of the collar portion 41c. Then, the restraining portion 50b is engaged with the restraining groove 54 formed in the base end surface of the collar portion 41c.

Also in the case of the structure of this example as described above, the labor required for attaching and detaching the sensor unit 39d to and from the cover 18g is reduced, and the cost of the rolling bearing unit with the rotation speed detecting device itself and the repair are improved. The cost required can be reduced. In the case of the structure of this example, the cover 1
8 g of the ring-shaped bottom plate portion 37 a is embedded in the outer peripheral half of the cored bar 88 that constitutes the seal ring 82 a and is attached to the inner peripheral edge of the cored bar 88 over the entire circumference. The leading edge of the seal lip 89 is brought into sliding contact with the outer peripheral surface of the constant velocity joint 90. In the case of the present example, the seal lip 89 prevents foreign matter from entering the space 43 in which the rolling elements 9, 9 are installed. Therefore, foreign matter does not enter the encoder 3a portion.

Next, FIGS. 31 to 32 correspond to claim 1 .
An eighth example of an embodiment of the present invention is shown. In the case of this example, the locking leg portions 49b, 49 of the coupling spring 47g are provided.
A pivotally supporting portion 84a for pivotally supporting b is formed by projecting portions 91 provided at two positions on the diametrically opposite side of the stepped portion 87 of the cover 18h. Then, recessed holes 92 (having bottoms) that do not penetrate to the inner peripheral surface of the cover 18h are provided concentrically with each other on the surfaces of the respective projecting portions 91 opposite to each other. Further, the coupling spring 47b used in this example is shown in FIG.
As shown in FIG. 2, a pair of locking leg portions 49 provided at the tip portions of the connecting portions 51e, 51e continuous from both ends of the restraining portion 50b.
It is formed by bending b and 49b toward each other. The pair of locking leg portions 49b, 49b are arranged coaxially with each other. Then, the locking legs 49b, 49b are locked in the recessed holes 92 of the pivotally supporting parts 84a, the coupling spring 47f and the pair of locking legs 49b, 49b are connected to the cover 18h. Supports swinging around the center. The locking legs 49b and 49b are the pivotally supporting portions 8.
The distance D _49b between the tips of the locking legs 49b, 49b in the free state of the coupling spring 47f is the distance D _84a between the pair of pivotally supporting portions _84a (in order to prevent the coupling spring 47f from being disengaged). Sufficiently smaller than (not shown) (D _49b <
D _84a ). Further, the connecting portions 51e and 51e of the coupling spring 47f have a meandering shape in order to provide the necessary elasticity even with a short total length. Other configurations and operations are the same as those in the above-described seventh example, and therefore, equivalent parts will be denoted by the same reference numerals and redundant illustration and description thereof will be omitted.

Next, FIGS. 33 to 39 show a ninth example of an embodiment of the present invention corresponding to claims 1 to 3 .
The inner end (right end in FIG. 33) opening of the outer ring 1, which is a stationary wheel, is
It is closed by the cover 18i. This cover 18i is
Similarly to the cover 18a incorporated in the structure of the first example described above, a bottomed cylindrical main body 28 formed by injection molding a synthetic resin.
b and a fitting cylinder 29 connected to the opening of the main body 28b. In addition, the inner ring 7 that constitutes a rotating wheel together with the hub 2a
Similarly to the fourth example shown in FIG. 12, the a is externally fitted to the inner end portion of the hub 2a, and a part of the hub 2a is caulked and expanded outward in the diametrical direction. It is fixed against. An encoder 3 similar to that of the conventional structure shown in FIGS. 59 to 60 is externally fitted and fixed to the step portion 69 formed at the inner end portion (right end portion in FIG. 33) of the inner ring 7a. .

Further, the main body 28 constituting the cover 18i.
An insertion hole 38 is formed in a portion of the bottom plate portion 37b of b that faces the inner surface of the circular ring portion 16 that constitutes the encoder 3.
With the bottom plate portion 37b penetrating, the outer ring 1
Is formed in the axial direction. Further, the outer surface of the bottom plate portion 37b (the rolling elements 9, 9 to be closed by the cover 18i)
33 is a side surface on the side opposite to the space 43 in which is installed, and is a part of the right side surface in FIG. 33). With
It constitutes a single cylindrical surface. Then, these insertion holes 38
Also, the same sensor unit 3 as the sensor unit 39 (FIGS. 1 and 3) incorporated in the first example described above is provided in the locking cylinder 44e.
9e is inserted near the tip.

On the other hand, near the base end of the locking cylinder 44e (see FIG. 3).
4, 37, 38, 39) and a pair of pivot holes 93 are provided at positions on the diametrically opposite side of the locking cylinder 44e.
Are formed concentrically with each other. Each of these pivot holes 93
Does not penetrate to the inner peripheral surface of the locking cylinder 44e. The reason for this is to prevent foreign matter from entering the locking cylinder 44e through the pivot holes 93.
Further, a pair of stopper plates 94 constituting a retaining means is provided integrally with the cover 18i on the outer surface of the bottom plate portion 37b in the vicinity of the outer peripheral surface of the locking cylinder 44e. The positions where these stopper plates 94, 94 are formed are positions deviated from the extension of the pivot holes 93. In the illustrated example, the two pivotally supporting holes 93 are slightly covered with the cover 18 rather than the opposite positions in the diametrical direction of the locking cylinder 44e.
diametrically outward of i (above FIGS. 34, 37, 38, 39)
It is formed at a position that is slightly offset. On the contrary,
The stopper plates 94 are provided at diametrically opposite positions of the locking cylinder 44e. Further, the end edges of the stopper plates 94 on the opposite sides, and the locking cylinder 44.
A gap is provided between the outer peripheral surface of e and the proximal end portion of the coupling spring 95, which will be described below.

1 is provided at both ends of a coupling spring 95 for coupling the sensor unit 39e to the cover 18i.
The pair of pivotally supporting portions 96, 96 are provided concentrically with each other with their respective tip surfaces facing each other. Further, the sensor unit 39 is provided at an intermediate portion of the coupling spring 95.
A restraining portion 97 is provided for pressing the flange portion 41d provided on e toward the opening end surface of the locking cylinder 44e. The restraining portion 97 is formed by bending a wire material that constitutes the coupling spring 95, and has concentric straight portions 98, 98 provided at both ends.
And a substantially semi-circular curved portion 99 existing between the straight portions 98, 98. Also, this curved portion 99
In the middle part of the above, a knob 100 is provided which is bent toward the side opposite to the pivotally supporting parts 96, 96. This picking part 1
00 is a sensor unit 39 for the cover 18i described later.
It is used as a clue for hooking a finger when advancing and retracting the restraining portion 97 with respect to the collar portion 41d for the work of attaching and detaching e. For this reason, the width W ₁₀₀ (FIG. 36) of the knob 100 is restricted to a size (for example, 15 mm or less) on which the thumb of the hand can be easily placed. Further, both end portions of the restraining portion 97 and the pivot supporting portions 96, 96 are respectively elastically deformable portions 10.
1, 101 are connected to each other. These both elastically deformable portions 101, 101 are formed by bending the wire rod.
It is formed in a V shape or arc shape and has elasticity in the direction of shortening the entire length.

On the other hand, on the base end surface of the flange portion 41d provided on the sensor unit 39e (the surface opposite to the insertion portion 40c, the right end surface of FIGS. 33, 34, 39), the restraining portion of the coupling spring 95 is provided. In order to engage 97 without rattling, the same holding groove 54 and inclined surface 57 as in the case of the first example described above are formed.

The work of mounting the sensor unit 39e on the cover 18i in order to form the rolling bearing unit with the rotational speed detecting device of the present embodiment by combining the respective members configured as described above is as follows. Like this.
First, before combining the sensor unit 39e and the cover 18i, the coupling spring 95 is attached to the locking cylinder 44e provided on the cover 18i. First, as shown in FIG. 37, the mounting work is performed by the connecting spring 95.
The entire operation is performed in a state in which the cover 18i is positioned diametrically outward, and is positioned diametrically outside the stopper plates 94. In this state, the pair of pivots 9
The spacing between the pair of pivot support portions 96 and 96 is elastically widened to align the pivot support portions 96 and 96 with the pivot support holes 93, and the pivot support portions 96 and 96 are inserted into the pivot support holes 93. At this time, the stopper plates 94 are attached to the pivot support portions 9
It does not hinder the work of inserting the 6, 96 into the both pivot holes 93.

As described above, when the base end portion (the end portion on which the both pivotally supporting portions 96, 96 are installed) of the coupling spring 95 is pivotally supported on the locking cylinder 44e, the coupling spring 95 is moved to the above. The both pivotal support parts 96, 96 are swung to the state shown in FIG. 38. That is, the elastic springs 101, 101 forming the connecting spring 95 are swung until the elastic springs 101, 101 partially contact the outer surface of the bottom plate portion 37b of the main body 28b forming the cover 18i. 10,
The portion near the base end of 1 is located between the outer peripheral surface of the locking cylinder 44e and the end edges of the stopper plates 94. In this state, the restraining portion 97 is completely retracted from the peripheral portion of the tip end opening of the locking cylinder 44e, and when the sensor unit 39e and the cover 18i are combined as described below, a part of the sensor unit 39e is removed. This prevents interference with the restraining portion 97. Since the locking cylinder 44e is provided near the upper end of the cover 18i, the coupling spring 95e.
Becomes stable in the state shown in FIG. 38 due to gravity. In this state, the coupling spring 95 does not interfere with a part of the knuckle, and the outer ring 1 on which the cover 18i and the coupling spring 95 are mounted can be inserted into the mounting hole provided in the knuckle. Therefore, if the joint spring 95 is attached to the cover 18i and delivered to an automobile assembly maker, the assembly maker can omit the work of attaching the joint spring 95 to the cover 18i.

The sensor unit 3 is attached to the cover 18i.
In order to connect and fix 9e, the above-mentioned connecting spring 95 is mounted on the above-mentioned locking cylinder 44e as described above, and the above-mentioned sensor unit is swung to the position shown in FIG. Insertion portion 40c which is a portion near the tip of 39e
Is inserted into the locking cylinder 44e and the insertion hole 38.
Then, the collar portion 41d is brought into contact with the tip end surface of the locking cylinder 44e. In this state, a desired thickness dimension (for example, 0 There is a small gap of about 0.5 mm). Next, the coupling spring 95 is swung about the pair of pivotally supporting portions 96, 96 in a direction to bring the restraining portion 97 closer to the flange portion 41d. Then, as shown in FIGS. 33 to 34, the restraining portion 97 rides on the base end surface of the collar portion 41d through the state shown in FIG. Press. In this state, the restraining portion 97 engages with the restraining groove 54 formed in the base end surface of the collar portion 41d.

As described above, the retaining portion 9 of the coupling spring 95 is used.
The work for mounting 7 on the base end surface of the collar portion 41d is as follows.
This is performed by pressing the knob 100 with fingers. By pressing the grip portion 100 toward the collar portion 41d, the linear portions 9 provided at both ends of the restraining portion 97.
8 and 98 are the inclined surfaces 57 formed on the collar portion 41d.
Get on. If the operation of pressing the knob portion 100 is further continued from this state, the restraining portion 97 causes the holding portion 97 to move.
It engages with the holding groove 54 formed on the base end surface of 1d. In this manner, with the pressing portion 97 and the pressing groove 54 engaged,
The pair of elastically deforming portions 101, 101 is in a state where the entire length is elastically extended. Therefore, the restraining portion 97 elastically presses the brim portion 41d toward the tip end surface of the locking cylinder 44e based on the elastic restoring force of the pair of elastically deforming portions 101, 101. In order to facilitate this work, when the coupling spring 95 is rotated around the pivotal support portions 96, 96 in a free state, the linear portions 98, 98 are inclined. The size of the coupling spring 95 is regulated so as to come into contact with the surface 57. Further, as described above, when the coupling spring 95 is pivotally displaced with respect to the locking cylinder 44e,
The distance between the pair of elastically deformable portions 101, 101 is set so that the elastically deformable portions 101, 101 do not interfere with the outer peripheral surface of the locking cylinder 44e and the outer peripheral edge of the collar portion 41d.
The diameter is set to be slightly larger than the outer diameters of the locking cylinder 44e and the flange portion 41d.

As described above, when the holding portion 97 is engaged with the holding groove 54, the coupling spring 95 directs the collar portion 41d toward the tip end surface of the locking cylinder 44e with a sufficiently large force. By pressing, the sensor unit 39e is coupled to the cover 18i. Further, in this state, a part of each of the elastically deformable portions 101, 101 is provided with each of the pivotal support portions 96, 96.
Of the stopper plates 94 contact or come close to the edges of the pair of stopper plates 94. Therefore, each elastic deformation portion 1 is
There is almost no elastic deformation in the direction in which the distance between the base end portions of 01 and 101 increases, and the pivotal support portions 96, 96 do not slip out of the pivotal support holes 93. As a result, even when an external force acts on each of the elastically deformable portions 101, 101, such as when a stepping stone or the like during running collides with the coupling spring 95 with force, each of the pivotally supported portions 96, 96 causes the pivotally supported holes. 9
The sensor unit 39 will no longer come out of 3
e will not accidentally come off from the joint with the cover 18i.

The sensor unit 39e is attached to the cover 1
When removing from 8i, contrary to the case of the above-described mounting work, first, the fingers are hooked on the knob 100 to retract the restraining portion 97 of the coupling spring 95 from the base end surface of the collar portion 41d. In this way, the restraining portion 97 is connected to the collar portion 41d.
After retracting from the inside, the insertion portion 40c of the sensor unit 39e is pulled out from the inside of the insertion hole 38 and the locking cylinder 44e.

Next, FIG. 40 shows a tenth example of an embodiment of the present invention, which also corresponds to claims 1 to 3 . In the case of this example, the main body 28 forming the cover 18i is formed by the edges of the stopper plates 94, 94 facing each other.
Locking protrusions 102 and 102 are formed at portions slightly apart from the outer surface (upper surface of FIG. 40) of the bottom plate portion 37b of FIG. Then, the distance D ₁₀₂ between the tips of the respective locking projections 102, _{102 is set} to the coupling spring 95 in the free state.
The distance D between the outer edges of the elastically deformable portions 101, 101
_It is smaller than ₁₀₁ (D ₁₀₂ <D ₁₀₁ ).
Therefore, in the case of this example, as shown in FIG. 38 described above, regardless of the posture of the cover 18i, the pressing portion 97 is swung in the direction of retracting from the opening portion of the distal end of the locking cylinder 44e. The positional relationship between the coupling spring 95 and the cover 18i can be kept constant. Therefore, in the process of delivering from the manufacturer that assembled the rolling bearing unit equipped with the cover 18i to the assembly manufacturer of the vehicle that mounts the sensor unit,
Make sure that the positional relationship of the coupling spring 95 does not shift,
It is possible to improve the efficiency of the assembly work at an automobile assembly maker.

Next, FIG. 41 corresponds to claims 1 and 2.
That shows an eleventh example of the embodiment of the present invention. In the case of this example, the total length of the pair of elastically deformable portions 101a and 101a is increased so that the required elasticity can be obtained even if the diameter of the wire material forming the coupling spring 95a is increased. The bending amount of the deforming portions 101a and 101a is increased.
That is, the coupling spring 95a assembled to the rolling bearing unit with the rotation speed detecting device of the present invention is likely to be rusted because it is highly likely that muddy water, a snow melting agent, or the like will adhere. When made of stainless spring steel, it is easy to secure the required durability without increasing the diameter of the above wire rod, but it is a relatively inexpensive non-stainless steel. In the case of using, even if the surface is plated with zinc or chrome, it is necessary to increase the diameter of the wire in order to ensure the required durability. On the other hand, if the diameter is made thick, the rigidity of the coupling spring 95a becomes too high (the spring constant is too large), and the restraining portion 97 is moved to the collar portion 4.
It will be difficult to drive 1d (see FIG. 39).
Considering these matters, it is appropriate that the diameter of the wire material forming the coupling spring 95a is about 1 to 2 mm. However, when the diameter is about 2 mm, the rigidity of the coupling spring 95 becomes too high with the shape of the coupling spring 95 as shown in FIG. Therefore, when the diameter is increased, a pair of elastically deformable portions 101a, 101a are provided as in this example.
Lengthen the entire length to increase the amount of bending and ensure the required elasticity.

The structure of the rotation speed detecting devices of the ninth to eleventh examples described above is not limited to the one using the passive type magnetic sensor as shown in the drawing, but one using the active type magnetic sensor or the vortex. It is also possible to adopt a sensor using a current type or photoelectric type sensor. A sensor using the active type magnetic sensor can reduce the size and weight of the entire sensor unit. Therefore, the inertial mass is small, and the kinetic energy due to the vibration accompanying traveling of the vehicle is small. As a result, the restraining load required for the coupling spring 95 can be reduced, and the coupling spring 95 using the thin wire (about 1 to 2 mm) as described above can be used.

Next, FIGS. 46 to 50 show a twelfth example of an embodiment of the present invention corresponding to claims 1 to 3 . This example is intended to solve the problem newly generated in the structure of the eleventh example described above. That is, in order to secure the durability of the coupling spring 95a shown in the eleventh example, which is in a rusty state, instead of increasing the diameter of the wire rod, the pair of coupling springs 95a constituting the pair of coupling springs 95a are configured. The elastically deforming portions 101a, 101a are made longer to increase the amount of bending.

The rigidity is increased by increasing the diameter of the wire material forming the coupling spring 95a or changing the material of the wire material.
If the total length of a and 101a is increased, the coupling spring 95a
When there is a dimensional error in the engaging portion of the cover 18i or the sensor unit 39e that engages with the coupling spring 95a, this dimensional error can be effectively absorbed. That is, if the coupling spring 95a is made of a highly rigid material and the total length of the elastically deformable portions 101a, 101a is increased,
The coupling spring 95a can hold the load for suppressing the sensor unit 39e within an appropriate range and can absorb the dimensional error while keeping the stress applied to the coupling spring 95a within the allowable value. On the other hand, by reducing the rigidity of the wire to secure a predetermined elastic deformation amount while keeping the total length of the pair of elastic deformation portions 101a, 101a short, it is possible to absorb the dimensional error. Despite the dimensional error of the engaging portion, it becomes difficult for the coupling spring 95a to properly hold the load for suppressing the sensor unit 95a and to keep the stress applied to the coupling spring 95a within the allowable value. Therefore, for this reason as well, there may be a case where it is preferable to increase the total length of the pair of elastically deformable portions 101a and 101a.

However, the pair of elastic deformation portions 1 are simply
When the lengths of 01a and 101a are increased, as shown in FIGS. Even if the coupling spring 95a is swung, a part of the pair of elastically deformable portions 101a, 101a abuts the side surface of the bottom plate portion 37b of the cover 18j, and the swing of the coupling spring 95a is restricted. In some cases, the restraining portion 97 of the coupling spring 95 cannot be fully retracted from the opening of the locking cylinder 44e. In this way, when the holding portion 97 cannot be fully retracted from the opening of the locking cylinder 44e, the holding portion 97 is
It prevents the sensor unit 95a from being attached to or detached from the cover 18j.

On the other hand, in order to eliminate such an adverse effect, FIG.
As shown in 45, the axial distance L ₉₃ between the pivot hole 93 and the side surface of the bottom plate portion 37b of the cover 18k is sufficiently secured so that the holding portion 97 is retracted from the opening portion of the locking cylinder 44f. A structure is also conceivable in which the coupling spring 95a can swing until it is completely broken. However, in such a structure, the pivot hole 93
The axial length of the locking cylinder 44f provided with is increased, which makes it difficult to reduce the size of the rolling bearing unit with the rotation speed detection device. The rolling bearing unit with a rotation speed detecting device of the twelfth example shown in FIGS. 46 to 50 has a detachable property of the sensor unit with respect to the cover even if the total length of the coupling spring is sufficiently long in order to eliminate the above-mentioned inconvenience. This is intended to realize a structure that can maintain the good condition.

The characteristic feature of the rolling bearing unit with a rotation speed detecting device of this embodiment is that the detachability of the sensor unit 39e from the cover 18j can be kept good even if the total length of the coupling spring 95b is sufficiently long. The configuration and operation of the other parts are the same as those of the ninth and eleventh examples shown in FIGS. 33 to 39 and 41 described above, and therefore the description and illustration of the equivalent parts will be omitted or simplified. In this example, as in the ninth and eleventh examples, the pivot portion 96 of the coupling spring 95a is used.
The stopper plate 94 (see FIGS. 34, 37, 3
8, 39) is not provided, but it can be provided if necessary.

On a part of the side surface of the bottom plate portion 37b of the cover 18j that closes the inner end opening of the outer ring 1 (see FIG. 33), the locking cylinder is projected in the axial direction (left and right direction in FIGS. 46 and 47). Four
4e is provided. Then, a pair of pivotally supporting holes 93 that do not penetrate to the inner peripheral surface are provided concentrically with each other at two positions on the outer peripheral surface of the locking cylinder 44e which are substantially opposite to each other in the diametrical direction. A pair of pivotally supporting portions 96 provided at both ends of the coupling spring 95b, which is a member, is pivotally supported. As shown in FIGS. 48 to 50, the coupling spring 95a has a pair of pivotally supporting portions 96, 96 concentric with each other at both ends thereof, and a collar portion 41d provided at an intermediate portion thereof at a base end portion of the sensor unit 39e.
Is pressed against the peripheral edge of the opening of the locking cylinder 44e.
Are connected to one end of the pair of pivotally supporting portions 96, 96 and the restraining portion 97.
A pair of elastically deformable portions 101, which are connecting portions, between the both ends of
b and 101b are provided respectively. The pair of elastically deformable portions 101b, 101b are formed by a pair of first linear portions 103, 103 continuous from one end of the pivotally supporting portions 96, 96.
And a pair of second straight line portions 104, 104 continuous from both ends of the restraining portion 97, and the first and second straight line portions 10
A pair of curved portions 105 and 105 connecting the three and 104
It consists of and. The pair of elastically deformable portions 101b, 101b
Is sufficiently long in order to secure the durability of the coupling spring 95b and to effectively absorb the dimensional error between the coupling spring 95b and each member engaged with the coupling spring 95b.

In particular, in the case of the present embodiment, the cover is provided with the pair of elastically deforming portions 101b and 101b in a state where the restraining portion 97 presses the sensor unit 39e against the peripheral edge portion of the opening of the insertion hole 38. With respect to the bottom plate portion 37b of 18j, the bottom plate portion 3
It is inclined in a direction away from 7b. That is, the elastically deformable portions 101b and 101b are entirely covered by the pair of pivot holes 9
3, and the insertion hole 38 from the virtual plane β (FIG. 47) parallel to the side surface of the bottom plate portion 37b of the cover 18j.
Is located on the opening side (right side of FIGS. 46 and 47) and is inclined in a direction away from the virtual plane β as it is farther from the pivot hole 93. With this configuration, the coupling spring 95b can be swung so that the pressing portion 97 does not interfere with the insertion and removal of the sensor unit 39e into and from the locking cylinder 44e. Therefore, the restraining portion 97 of the coupling spring 95b is connected to the sensor unit 39.
Each of the elastically deformable portions 1 is engaged with the flange portion 41d of e.
The angle γ formed by the virtual plane β and the first straight line portions 103 and 103, which are the portions close to the bottom plate portion 37b, which constitute 01b and 101b, is set to a predetermined value or more determined by design. That is, this angle γ swings the coupling spring 95b in the clockwise direction in FIG. 47 about the pivot portions 96, 96, and causes a part of the elastically deformable portions 101b, 101b to move to the bottom plate portion 37b. When the stopper portion 97 is brought into contact with the portion, the restraining portion 97 is fully retracted from the opening portion of the locking cylinder 44e (outside the virtual space obtained by extending the outer peripheral surface of the locking cylinder 44e. ), The holding portion 97 has an angle not less than an angle that does not hinder the work of inserting / removing the sensor unit 39e into / from the locking cylinder 44e.

Also in the case of the rolling bearing unit with the rotational speed detecting device of the present embodiment configured as described above, the labor required for the work of attaching / detaching the sensor unit 39e to / from the cover 18j is reduced as in each of the above-described examples. Thus, it is possible to reduce the cost of the rolling bearing unit with a rotation speed detecting device itself and the cost required for repair. Particularly, in the case of this example, the pair of elastically deformable portions 101b and 101b forming the coupling spring 95b.
Is tilted. Therefore, even if each of the pivotally supporting holes 93 is provided near the bottom plate portion 37b, the coupling spring 9 is attached so as to attach / detach the sensor unit 39e to / from the cover 18j.
It is possible to secure an angle at which the coupling spring 95b can swing when 5b is swung in the direction in which the elastically deformable portions 101b, 101b move away from the opening of the insertion hole 38. Therefore, the restraining portion 97 provided on the coupling spring 95b does not hinder the work of attaching / detaching the sensor unit 39e to / from the cover 18j. As a result, the coupling spring 9
In order to ensure the durability of 5b and to effectively absorb the dimensional error with each member engaging with this coupling spring 95b, even if the total length of this coupling spring 95b is made sufficiently long, Cover 1 without increasing the axial length.
The detachability of the sensor unit 39e with respect to 8j can be kept good.

In the case of the present embodiment, the collar portion 41d of the sensor unit 39e is engaged with the collar portion 41d of the sensor unit 39e at the intermediate portion of the collar portion 97 of the coupling spring 95b. Picking portion 10 protruding from the vertical direction
6 is provided. When the sensor unit 39e is attached to or detached from the cover 18j, by gripping the knob 106, the coupling spring 95b can be easily swung. It should be noted that the restraining portion 95b is the sensor unit 39 described above.
In the state of engaging with the restraining groove 54 of e, this coupling spring 95
The restraining portion 97 of b holds the collar portion 41d to the locking cylinder 44e.
Towards the end face of, press with a sufficiently large force. Therefore,
The ratio (lever ratio) of the distance L ₁₀₆ between the pivotal support portion 96 and the tip end of the knob 106 to the distance L ₉₇ between the pivotal support portion 96 and the base end of the restraining portion 97 is relatively large (for example, the lever ratio is 2 or more (L ₁₀₆ / L ₉₇ ≧ 2)} is preferable from the viewpoint of ensuring the swingability of the coupling spring 95b.

Next, FIGS. 51 to 53 show claims 1 and 2.
The corresponding 13th example of embodiment of this invention is shown. In the case of this example, a pair of elastically deformable portions 101c and 101c for connecting a pair of pivotally supporting portions 96 and 96 provided at both ends of the coupling spring 95c and a restraining portion 97 provided at an intermediate portion,
Each of the elastically deformable portions 101c is bent at a portion where the bending moment acting on the coupling spring 95c is maximized.
The length of 101c is increased. The reason why the predetermined portions of the elastically deformable portions 101c, 101c are lengthened in this way is as follows.

Castigliano's theorem
According to theorem), it is known that if the length of the cross section where the bending moment acting on the elastic body is large is lengthened, the amount of deflection of this elastic body becomes large. If the bending moment acting on the elastic body is made too large, the stress acting on the cross section exceeds the allowable stress and the elastic body may be broken. Therefore, the coupling spring 9 is an elastic body.
In 5c, if the length of the portion where the acting bending moment is maximized is increased, it is possible to obtain a coupling spring 95c that is more easily deformed and less likely to be broken. In the case of this example, the portion where the tensile load P acts to swing the coupling spring 95c is the portion where the coupling spring 95c engages with the cover 18j and the sensor unit 39e, that is, points X and Y shown in FIG. . The portion of the coupling spring 95c where the bending moment acts the maximum is the distance L ₉₅ that is the farthest from the point X.
A portion, that is, a first bending portion 107, 107 portion and a second bending portion 108, 108 portion, which respectively configure the elastic deformation portions 101c, 101c. Therefore, by increasing the length of each of the curved portions 107 and 108, it is possible to obtain the coupling spring 95c that is more easily deformed and less likely to be broken. It should be noted that, as in the illustrated example, the first bending portion 10
7, 107 and the second curved portions 108, 108 are arranged on both sides of the line of action of the load P because of the coupling spring 95.
The first and second curved portions 107, 10 are provided without projecting c outwardly in the diametrical direction with respect to the outer peripheral edge of the cover 18j.
This is to secure the required length of 8. Other configurations and operations are similar to those of the above-described twelfth example.

Next, FIGS. 54 to 58 show a fourteenth example of an embodiment of the present invention corresponding to claims 1 to 3 . When the rolling bearing unit with the rotation speed detecting device is used, there is a high possibility that muddy water, a snow-melting agent or the like will adhere to the coupling spring that couples and supports the sensor unit to the cover as the vehicle runs. Since this coupling spring is made of metal, if muddy water or the like adheres to the coupling spring as described above, it may rust early if the material of the spring is inexpensive non-stainless steel. In particular, the muddy water or the like is likely to collect in the portion where the restraining portion provided in the intermediate portion of the coupling spring engages with the flange portion of the sensor unit, and the above portion may rust particularly early. In consideration of the above-mentioned circumstances, the rolling bearing unit with the rotation speed detecting device of the present example is designed to prevent the coupling spring from rusting even when the coupling spring is made of inexpensive non-stainless steel. Is.

As described above, the characteristic feature of the rolling bearing unit with the rotation speed detecting device of the present embodiment is that the coupling spring covers the portion where the coupling spring engages with the sensor unit. Regarding the configuration and operation of the other parts, the first part shown in FIGS.
Since it is the same as the two examples, the same parts are designated by the same reference numerals,
Overlapping description and illustration will be omitted or simplified.
In this example, the coupling spring 95 as in the ninth to tenth examples described above.
The stopper plate 94 (see FIG. 3) for preventing the pivot support portion 96 of b from coming out from the pivot support hole 93 provided in the cover 18j.
4, 37, 38, 39, 40) are not provided. However,
The stopper plate 94 may be provided as long as it can prevent interference with the covering member 109 described below.

A covering member 109 having a waterproof function is supported on the outer peripheral surface of the intermediate portion of the circular rod-shaped projection 111 provided at the center of the base end portion of the sensor unit 39e. This covering member 10
9 is made of an elastic material such as rubber or synthetic resin such as Hytrel. Further, the covering member 109 has a bag shape that can be inverted so that the opening portion is in the opposite direction. Further, a through hole 110 penetrating in the axial direction is formed in the center of the bottom of the covering member 109.
Is provided. Then, the through hole 110 is formed in the locking groove 112 provided on the outer peripheral surface of the intermediate portion of the protrusion 111 over the entire circumference.
The inner peripheral edge of the is locked. In addition, the sensor unit 3
The harness 46 connected to the sensor (not shown) embedded inside 9e is led out from the tip end surface of the protrusion 111.

Also, a coupling spring 95b for pressing the flange portion 41d of the sensor unit 39e against the peripheral edge of the opening of the insertion hole 38 in order to make the sensor unit 39e detachable from the cover 18j is shown in FIG. As shown, a pair of pivotally supporting portions 96, 96 provided at both ends, a holding portion 97 provided at an intermediate portion, and a pair of elastically deforming portions 101b connecting the pivotally supporting portions 96, 96 and the holding portion 97. , 101b. The pair of elastically deformable portions 101b and 101b are a pair of first linear portions 103 and 103 continuous from one end of the pivot portions 96 and 96, and a pair of third linear portions 103 and 103 continuous from both ends of the restraining portion 97. Linear portions 113, 113 and second linear portions 104, 104 continuous from one end of the pair of third linear portions 113, 113 and substantially parallel to the first linear portions 103, 103, and First and second straight portions 10
A pair of curved portions 105 and 105 connecting the three and 104
It consists of and.

In the case of this example including the covering member 109 as described above, the covering member 109 allows the coupling spring 95b to be formed.
Covers the portion where the restraining portion 97 and the sensor unit 39e are engaged. When the sensor unit 39e is attached to or detached from the cover 18j, as shown in FIG. 55, the covering member 109 previously locked to the sensor unit 39e is opened on the side opposite to the collar portion 41d, and The engagement work between the sensor unit 39e and the coupling spring 95b is not disturbed. In this state, as shown in FIG. 56, the insertion portion 40c of the sensor unit 39e is inserted inside the locking cylinder 44e provided on the cover 18j.
Then, the coupling spring 95b is swung about the pivotally supporting portions 96, 96 pivotally supported by the pivotally supporting hole 93 provided in the locking cylinder 44e, and the restraining portion 97 provided at the coupling spring 95b is
The holding groove 54 provided in the collar portion 41d of the sensor unit 39e is engaged. The structure and operation of this portion are almost the same as in the case of the twelfth example shown in FIGS. After engaging the restraining portion 97 and the restraining groove 54, as shown in FIGS. 54 and 57, the covering member 109 is inverted and the opening of the covering member 109 is directed in the opposite direction. The peripheral edge of the opening of 109 is elastically brought into contact with the outer peripheral surface of the locking cylinder 44e. In this state, the covering member 10
9 covers the portion where the restraining portion 97 provided on the coupling spring 95b and the sensor unit 39e engage.

According to the rolling bearing unit with the rotation speed detecting device of the present embodiment configured as described above, the coupling spring 95 is used when the rolling bearing unit with the rotation speed detecting device is used.
It is possible to prevent muddy water or the like from being directly applied to the portion where b and the sensor unit 39e are engaged with each other from the outside, and to prevent the coupling spring 95b from rusting. In addition, in such a state that a part of the coupling spring 95b is covered with the covering member 109, the coupling spring 95b cannot be removed from the sensor unit 39e unless the covering member 109 is inverted. Therefore, as described above, the stopper plate 94
It is possible to prevent the sensor unit 39e from being accidentally detached from the cover 18j without providing (FIGS. 37 to 40).

The distance L ₁₁₃ (FIG. 58) between the third linear portions 113, 113 forming the coupling spring 95b is as follows.
In the free state of the third linear portions 113, 113, the outer diameter d ₄₄ (FIG. 54) of the locking cylinder 44e is substantially equal to or slightly reduced. The reason is that the coupling spring 95b causes the sensor unit 39e to move due to the covering member 109.
The third linear portion 11 is covered with a portion that engages with
This is because 3, 113 prevent the muddy water and the like from easily entering the vicinity of the engaging portion by pushing the opening of the covering member 109 from the inside.

The peripheral edge of the opening of the covering member 109 is
Although it is elastically abutted toward the outer peripheral surface of the locking cylinder 44e, the third straight line portion 11 constituting the coupling spring 95b is formed.
Due to the existence of Nos. 3 and 113, a gap that cannot be brought into close contact with each other is generated between the outer peripheral surface of the locking cylinder 44e and the covering member 109, and a completely sealed state cannot be achieved. However, in a state of being installed in a vehicle, the first and second straight line portions 103 that constitute the coupling spring 95b in a state where the coupling spring 95b presses the sensor unit 39e against the opening peripheral edge portion of the insertion hole 38, 104 and the curved portions 105, 105 are located below the restraining portion 97. In other words, the third linear portions 113, 113 are replaced by the restraining portions 9
It is designed not to be located above 7. As a result, the opening of the gap faces downward and prevents muddy water or the like from entering through the gap and collecting muddy water or the like between the covering member 109 and the locking cylinder 44e.

Further, in the case of the present embodiment, in the periphery of the opening of the pivot hole 93 provided in the locking cylinder 44e, the portion located on the upper side when the rolling bearing unit with the rotation speed detecting device is used is
A pair of eaves 114 are provided, and the bottom 114 prevents muddy water or the like from entering the portion between the pivots 96, 96 and the pivot hole 93. The eaves portion 114 is provided only on the upper portion so that the bottom portion 114 does not hinder the swing of the coupling spring 95b. Since the eaves portion 114 can be manufactured by integral molding when the cover 18j is injection-molded, its forming work is easy.

In the case of the illustrated example, as shown in FIG. 54, the structure of the rolling bearing unit for supporting the driven wheel, in which the inner ring 7 is fixed to the hub 2 by swaging the end portion of the hub 2, is provided. However, the rolling bearing unit with a rotation speed detecting device of this example is not limited to such a structure, and other structures such as a rolling bearing unit supporting a drive wheel are described. Can also be applied. Further, the rolling bearing unit with a rotation speed detecting device of this example can be applied not only to the structure in which the sensor unit 39e is inserted in the axial direction of the hub 2 as in the illustrated example, but also to the structure in which it is set in the radial direction.

A feature of the present invention is the structure of the portion where the sensor or the holder holding the sensor is mounted on the cover. The structure of the rotation speed detection device consisting of a sensor and an encoder is not limited to the magnetic detection type as shown in each of the illustrated examples, but various conventionally known structures such as an eddy current type and a photoelectric type are adopted. it can.

[0103]

The rolling bearing unit with a rotation speed detecting device according to the present invention is constructed and operated as described above, and since only the sensor or the holder holding the sensor can be easily attached and detached, maintenance of the rotation speed detecting device is performed.・ Inspection becomes easy. In addition, since the sensor or the holder holding the sensor can be easily attached to the cover later, for example, a harness for taking out the detection signal of the sensor can be installed in a space before mounting the rolling bearing unit to the suspension device. It can be attached to the vehicle body in a certain state. The sensor or the holder holding the sensor can be attached to the cover attached to the rolling bearing unit after the rolling bearing unit is attached to the suspension device. Therefore, even if the harness or the holder holding the sensor is connected to the harness, the rolling bearing unit and the sensor can be easily mounted. As a result, the connector for connecting the sensor and the harness can be omitted, and the cost can be reduced from this aspect.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing only a cover.

FIG. 3 is a perspective view showing only an end portion of a harness and a sensor unit.

FIG. 4 is a sectional view showing part A of FIG. 1 with only the cover taken out.

FIG. 5 is a perspective view of a coupling spring for coupling the sensor unit and the cover.

FIG. 6 is a front view showing a second example of the embodiment of the present invention with only the cover taken out.

FIG. 7 is a view seen from the left side of FIG.

FIG. 8 is a perspective view of a coupling spring used in the second example of the embodiment of the present invention.

FIG. 9 is a front view showing the third example of the embodiment of the present invention with only the cover taken out.

FIG. 10 is a view seen from the left side of FIG.

FIG. 11 is a perspective view of a coupling spring used in the third example of the embodiment of the present invention.

FIG. 12 is a partial cross-sectional view corresponding to the right part of FIG. 1, showing a fourth example of the embodiment of the present invention.

FIG. 13 is a perspective view showing only a cover used in the fourth example.

FIG. 14 is a perspective view showing only the end portion of the harness and the sensor unit.

FIG. 15 is a perspective view showing only one coupling spring of the pair of coupling springs.

FIG. 16 is an enlarged perspective view showing only the joint between the cover and the sensor unit.

FIG. 17 is a partial cross-sectional view corresponding to the right part of FIG. 1, showing a fifth example of the embodiment of the present invention.

FIG. 18 is a partial perspective view showing only a cover used in the fifth example.

FIG. 19 is a perspective view showing only the end portion of the harness and the sensor unit.

FIG. 20 is a perspective view showing only the coupling spring in the same manner.

FIG. 21 is a sectional view showing a sixth example of the embodiment of the present invention.

FIG. 22 is a perspective view showing only the cover used in the sixth example.

FIG. 23 is a perspective view showing only the end portion of the harness and the sensor unit.

FIG. 24 is a perspective view showing only the coupling spring in the same manner.

FIG. 25 is a sectional view of an inner half portion of a rolling bearing unit with a rotation speed detecting device, showing a seventh example of an embodiment of the present invention.

FIG. 26 is a perspective view showing only a cover used for the seventh example.

FIG. 27 is a perspective view showing, similarly, the harness end and the sensor unit only.

FIG. 28 is a perspective view showing only the coupling spring in the same manner.

[Fig. 29] Similarly, a cover with no sensor unit attached,
The side view shown in the state where it was attached to the end of the outer ring in the state for carrying.

30 is an enlarged view of part B in FIG. 29.

FIG. 31 is a perspective view showing only the cover used in the eighth example of the embodiment of the present invention.

FIG. 32 is a perspective view showing only the coupling spring in the same manner.

FIG. 33 is a diagram showing a ninth example of the embodiment of the present invention and corresponding to the right part of FIG. 1.

FIG. 34 is a perspective view showing a cover with the sensor unit taken out.

FIG. 35 is a perspective view showing only the coupling spring.

FIG. 36 is a view on arrow C of FIG. 35 showing a knob of the coupling spring.

FIG. 37 is a partial perspective view showing a state in which a coupling spring is attached to the cover.

FIG. 38 is a partial perspective view showing a state in which a coupling spring is attached to the cover.

FIG. 39 is a partial perspective view showing a state in the middle of work for holding the sensor unit against the cover by the coupling spring.

FIG. 40 shows a tenth example of an embodiment of the present invention, and FIG.
8 is a view corresponding to the DD cross section of FIG.

FIG. 41 is a perspective view of a coupling spring showing an eleventh example of the embodiment of the present invention.

FIG. 42 is a perspective view showing a state in which a cover to which the sensor unit is attached is taken out in order to explain a new problem in the structure of the example.

FIG. 43 is a perspective view showing a state in which a coupling spring pivotally supported by the cover is swung in order to attach / detach the sensor unit to / from the cover.

FIG. 44 is a view similar to FIG. 42, which also shows an example of a solution.

FIG. 45 is a view similar to FIG. 43.

FIG. 46 is a perspective view showing a twelfth example of the embodiment of the present invention in a state where a cover to which a sensor unit is attached is taken out.

FIG. 47 is a side view seen from the front side of FIG. 46.

FIG. 48 is a perspective view showing only the coupling spring.

FIG. 49 is a view on arrow E of FIG. 48.

50 is a view on arrow F of FIG.

FIG. 51 is a perspective view showing a thirteenth example of the embodiment of the present invention with only the coupling spring taken out.

FIG. 52 is a view seen from below in FIG. 51.

53 is a view on arrow G in FIG. 51.

54 shows a fourteenth example of the embodiment of the present invention, FIG.
Corresponding to the right part of FIG.

FIG. 55 is a schematic cross-sectional view of the sensor unit with the covering member locked.

FIG. 56 is a partial perspective view showing a state before the sensor unit is held down by the cover by the coupling spring and the engagement portion between the coupling spring and the sensor unit is not covered by the covering member.

FIG. 57 is a partial perspective view showing a state after the engagement portion between the coupling spring and the sensor unit is covered with the covering member in the same manner.

FIG. 58 is a perspective view showing only the coupling spring.

FIG. 59 is an H-O-I of FIG. 60 showing an example of a conventional structure.
Sectional view.

FIG. 60 is a diagram viewed from the left side of FIG. 59.

[Explanation of symbols]

1 Outer ring 2, 2a, 2b Hub 3, 3a Encoder 4 Sensor 5 Outer ring raceway 6 Nut 7, 7a Inner ring 8 Inner ring raceway 9 Rolling body 10 Retainer 11 Flange 12 Mounting part 13 Seal ring 15 Cylindrical part 16 Circular ring part 17 Through hole 18, 18a, 18b, 18c, 18d, 18e, 18
f, 18g, 18h, 18i, 18j, 18k cover 19 fitting cylinder part 20 closing plate part 21 bulging part 22 through hole 24 detecting part 25 mounting flange 26 set screw 27 stud 28, 28a, 28b main body 29 fitting cylinder 30 Fitting cylinder part 31 Inward flange part 32 Through hole 33 O-ring 34 Support ring 35 Permanent magnets 36, 36a Cylindrical wall parts 37, 37a, 37b Bottom plate parts 38, 38a, 38b Insertion holes 39, 39a, 39b, 39c, 39d, 39e Sensor unit 40, 40a, 40b, 40c Insertion part 41, 41a, 41b, 41c, 41d Collar part 42 O-ring 43 Space 44, 44a, 44b, 44c, 44d, 44e, 44
f Locking cylinder 45, 45a, 45b Locking recess 46 Harness 47, 47a, 47b, 47c, 47d, 47e, 47
f, 47g Coupling springs 48, 48a, 48b Locking grooves 49, 49a Locking leg parts 50, 50a, 50b Restraining parts 51, 51a, 51b, 51c, 51d, 51e Connecting parts 52, 52a Curved parts 53, 53a Straight parts 54, 54a Restraining groove 55 Curved part 56 Straight part 57, 57a Sloping surface 58 Front end side bent part 59 Base end side bent part 60 Large diameter part 61 Small diameter part 62 Notch part 63 Straight side part 64 Collar part 65 Sloping side part 66 First locking notch 67 Second locking notch 68 Bent locking part 69 Step part 70 Shoulder part 71 Cylindrical part 72 Pivoting piece 73 Pivoting part 74 Elastic leg part 75 Locking hole 76 Locking groove 77 Tip Inner side surface 78 Tip inner side surface 79 Spline hole 80 Mounting flange portion 81 Locking groove 82, 82a Seal ring 83 Flat portion 84, 84a Pivot support portion 85 Locking hook 86 Sloping edge 87 Step portion 88 Core metal 89 Seal lip 90 Constant velocity joint 91 Protruding portion 92 Recessed hole 93 Pivot hole 94 Stopper plates 95, 95a, 95b Coupling spring 96 Pivot support portion 97 Suppression portion 98 Straight portion 99 Curved portion 100 Picking portion 101, 101a , 101b, 101c elastically deformable portion 102 locking projection 103 first straight portion 104 second straight portion 105 curved portion 106 knob portion 107 first curved portion 108 second curved portion 109 covering member 110 through hole 111 protruding portion 112 Locking groove 113 Third straight part 114 Eave part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI G01P 3/487 G01P 3/487 F (56) References JP-A-6-308145 (JP, A) JP-A-3-140619 ( JP, A) European patent application publication 743526 (EP, A 1) European patent application publication 92605 (EP, A1) French patent application publication 2678063 (FR, A 1) International publication 96/22536 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01P 1/02 G01P 3/48-3/489 B60T 8/00 F16C 19/00 F16C 19/52 F16C 41/00

Claims (5)

(57) [Claims] 1. A stationary wheel having a stationary side track on its stationary side peripheral surface, which does not rotate during use, and a rotating side track on a rotating side peripheral surface facing the stationary side peripheral surface, which rotates during use. A rotating wheel, a plurality of rolling elements rotatably provided between the stationary side raceway and the rotating side raceway, and a circumference fixed to a part of the rotating wheel concentrically with the rotating wheel. An encoder whose characteristics are alternately changed at equal intervals, a cover fixed to a part of the stationary wheel in a state of facing the encoder, and a detector. Supported by a part of the above cover while facing a part,
In a rolling bearing unit with a rotation speed detecting device including a sensor that changes an output signal in response to a change in the characteristics of the encoder, a part of the cover that faces a part of the encoder, An insertion hole is provided in which at least the tip-end portion of the sensor or the holder holding the sensor can be inserted, and at least a portion of the sensor or the holder holding the sensor that is off the tip-end portion. A positioning portion for positioning the sensor or the holder holding the sensor in the axial direction of the insertion hole is provided by contacting the opening peripheral edge portion of the insertion hole, and the cover and the sensor or the An elastic member that presses the positioning portion against the peripheral edge of the insertion hole is provided between the holder holding the sensor and the holder. Ri, rolling bearing unit, characterized in that that the sensor is detachably mounted to the cover. 2. The elastic member is a coupling spring formed by bending an elastic wire, and the coupling spring is attached to the holder.
The bottom plate that forms the cover by using the flange part that has the outward flange shape
The rolling bearing unit with a rotation speed detecting device according to claim 1, which is pressed against an end surface of a locking cylinder provided on an outer surface of the portion . 3. An outward flange-shaped collar portion provided on the holder.
Of which, from the base end surface on the side opposite to the insertion part provided in this holder
The harness has been pulled out, and the coupling spring is the base of this collar.
At the end face, the base end of this harness derived from this base end face
With respect to the diametrically opposite two positions,
The rolling bearing unit with a rotation speed detecting device according to claim 2 , which is engaged with the portion . 4. A wire whose coupling spring has elasticity and corrosion resistance.
A rolling bearing unit with a rotation speed detecting device according to claim 2 or 3, which is made of a material . 5. The holder has a circumferential phase relative to the cover.
Is regulated, the times according to any one of claims 2 to 4.
Rolling bearing unit with rolling speed detector.