JP2552357Y2 - Rolling bearing unit with sensor - Google Patents

Description

[Detailed description of the invention]

[0001]

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

[0002]

2. Description of the Related Art A wheel of an automobile is rotatably supported on a suspension device, and a rotational speed of the wheel is detected to control an antilock brake system (ABS) or a traction control system (TCS). For this reason, a rolling bearing unit with a sensor as described in, for example, JP-A-3-39161 has been known.

The rolling bearing unit with a sensor described in the above publication is configured as shown in FIG. An outer end of the hub 1 (an outer end is a portion which becomes an outer end in the width direction when mounted on an automobile, and a left end in FIG. 4) is provided with a flange 2 for fixing wheels, and an outer periphery of an intermediate portion. Inner ring track 3a on the surface
Is formed. Also, on the outer peripheral surface of the intermediate portion of the hub 1,
An inner ring 4 having an inner ring raceway 3b on the outer peripheral surface is externally fitted.

A male screw portion formed on an outer peripheral surface of the inner end portion of the hub 1 (the inner end portion is a portion which becomes an end portion on the center in the width direction when the hub 1 is mounted on an automobile, and a right end portion in FIG. 4). A nut 6 is screwed into 5. The nut 6 is connected to the male screw 5
And presses the inner end surface of the inner ring 4 to fix the inner ring 4 at a predetermined position on the outer peripheral surface of the hub 1.

The outer race 7 has a mounting portion 9 for supporting a knuckle (not shown) of the suspension on the outer peripheral surface, and double rows of outer raceways 10a and 10b formed on the inner peripheral surface. . The outer raceway 10a, 10b and the inner raceway 3a,
3b, a plurality of rolling elements 11, 1
The hub 1 is rotatably supported inside the outer race 7 supported by the suspension device by the mounting portion 9.

A ring-shaped pulse rotor 12 is externally fitted and fixed to a portion of the inner end of the hub 1 protruding from the nut 6. Further, a sensor 14 is fixed to a cover 13 fitted and fixed to an inner end opening of the outer ring 7, and an outer end surface of the sensor 14 is opposed to the pulse rotor 12.

In the case of the above-described rolling bearing unit with a sensor, the wheel fixed to the flange 2 provided at the outer end of the hub 1 can be rotatably supported by the suspension device supporting the outer ring 7.

When the pulse rotor 12 externally fitted and fixed to the inner end of the hub 1 rotates with the rotation of the wheel, the output of the sensor 14 facing the pulse rotor 12 changes. Since the frequency at which the output of the sensor 14 changes is proportional to the rotational speed of the wheel, the output signal of the sensor 14 is
5 and input to a controller (not shown),
By determining the rotation speed of the wheel, ABS and TCS can be appropriately controlled.

[0009]

By the way, in the conventional rolling bearing unit with a sensor constructed and operated as described above, a conducting wire 15 for extracting a signal from the sensor 14 is used.
Is led out inward (to the right in FIG. 4),
5 and a constant velocity joint 16 for rotating and driving the hub 1 (see FIG. 1 showing an embodiment of the present invention) easily interfere with each other.

In particular, a connector is provided on the sensor 14 in order to eliminate the trouble of mounting the sensor-equipped rolling bearing unit to which the long conducting wire 15 is attached to the suspension device and to improve the convenience of the mounting operation to the vehicle body. If a structure in which a plug provided at the end of a lead wire is connected to this connector after the sensor-equipped rolling bearing unit is attached to the suspension device, the plug is connected to the connector by interference with the constant velocity joint 16. I can't insert it.

For this reason, for example, US Pat. No. 4,904,936
As described in the specification, a rolling bearing unit with a sensor for supporting a driven wheel and detecting a rotation speed of the driven wheel can be driven even if a connector can be provided at a lead wire connecting portion. At present, it is impossible to provide a connector at the conductor connecting portion of the rolling bearing unit with a sensor for a wheel, and the conductor is directly connected to the sensor. As described above, the conductive wire hinders the operation of attaching the sensor-equipped rolling bearing unit to the suspension device.

The sensor-equipped rolling bearing unit of the present invention comprises:
It was conceived to address the problems as described above.

[0013]

A rolling bearing unit with a sensor according to the present invention has a flange for fixing a wheel at an outer end and an inner raceway on an outer peripheral surface, similarly to the above-described conventional rolling bearing unit with a sensor. A hub provided, an outer ring having an outer ring raceway on an inner peripheral surface, the outer race having an attachment portion for supporting the suspension device, and a plurality of rolling elements provided between the inner raceway and the outer raceway And a sensor supported by the outer ring,
A pulse rotor fixed to a portion of the inner end of the hub facing the detection portion of the sensor.

Further, in the rolling bearing unit with a sensor according to the present invention, a ring-shaped support frame made of a metal plate, which is fitted and fixed to the inner end of the outer ring, and an inner surface portion of the support frame. A holding portion provided so as not to protrude inward in the diameter direction from the inner peripheral edge of the support frame and to protrude from the inner side surface. In addition, a connector for holding the sensor in the holding portion and connecting a lead for signal extraction of the sensor is provided on a circumferential end face of the holding portion.

[0015]

With the sensor-equipped rolling bearing unit of the present invention configured as described above, the wheel is rotatably supported with respect to the suspension device, and the operation at the time of detecting the rotational speed of the wheel fixed to the hub is performed. In itself, it is the same as the above-mentioned conventional rolling bearing unit with a sensor.

Further, in the case of the rolling bearing unit with a sensor according to the present invention, a plug provided at the end of the conductor is inserted into a connector, thereby connecting the conductor and the sensor by moving the plug in the circumferential direction. In addition, since the connection is performed by approaching the connector, the connection operation can be performed without being disturbed by the constant velocity joint.

[0017]

1 to 3 show an embodiment of the present invention. A flange 2 for fixing a wheel is formed on the outer peripheral surface of the outer end (the left end in FIG. 1) of the hub 1. Inner ring raceways 3a and 3b are formed on the outer peripheral surface of the hub 1 and the outer peripheral surface of the inner ring 4 which is externally fitted and fixed to the hub 1, respectively.
The inner end of the inner race 4 projects slightly beyond the inner end surface of the hub 1 and abuts against the outer end surface of a constant velocity joint 16 for driving the hub 1 to rotate.

An outer half of a cylindrical pulse rotor 17 is externally fixed to the outer peripheral surface of the inner end of the inner race 4. In the inner half portion of the pulse rotor 17, a large number of through holes 24 having the same size are formed at equal intervals in a portion protruding from the inner end face of the inner ring 4 in the circumferential direction.

An outer peripheral surface of the outer race 7 is provided with a mounting portion 9 for fixing the outer race 7 to a knuckle (not shown) of a suspension device. In addition, outer ring raceways 10a and 10b are formed on the inner circumferential surface of the outer ring 7 so as to face the inner ring raceways 3a and 3b on the outer circumferential surface of the hub 1 and the inner ring 4 respectively. Then, a pair of inner raceways 3a and 3b and a pair of outer raceways 10
a, 10b, respectively, a plurality of rolling elements 11, 11
Is provided to allow the hub 1 to rotate freely inside the outer ring 7.

Sealing members 8 are provided between the inner peripheral surfaces of the inner and outer ends of the outer race 7 and the outer peripheral surfaces of the hub 1 and the inner race 4 so that the inner peripheral surface of the outer race 7 and the hub 1 and It is located between the outer peripheral surface of the inner race 4 and closes both ends of the space in which the plurality of rolling elements 11 and 11 are provided.

On the other hand, a support frame 18 as shown in FIG. The support frame 18, which is formed in a ring shape as a whole by press-forming a metal plate such as a stainless steel plate, has a cylindrical mounting portion 19 that can be fitted to the inner end of the outer ring 7 and a cylindrical mounting portion 19. An inward flange-shaped flange portion 20 bent inward at a right angle from the inner edge of the inner portion 19, and a part of the flange portion 20, from the inner side surface of the flange portion 20 (the right side surface in FIGS. 1 and 2). It is provided in a protruding state,
And a holding portion 21 opened toward the inner peripheral side.

A sensor 22 is held in the holding portion 21 by fitting the sensor 22 through an inner peripheral opening of the holding portion 22, and a detecting portion 23 of the sensor 22 is connected to the inner half of the pulse rotor 17 by It faces the portion where a number of through holes 24 are formed.

Further, a connector 25 is provided on one end surface of the holding portion 21 in the circumferential direction, and a plug fixed to an end of a lead wire (not shown) is connected and fixed to the connector 25 so that the sensor 22 detects the connection. Signals can be easily extracted. This connector 25 is, as shown in FIG.
The support frame 18 is provided at a position between the inner and outer peripheral edges of the support frame 18 in the circumferential direction.

With the sensor-equipped rolling bearing unit of the present invention configured as described above, the wheel is rotatably supported with respect to the suspension device, and the rotational speed of the wheel fixed to the flange 2 of the hub 1 is detected. The operation itself is almost the same as that of the above-described conventional rolling bearing unit with sensor.

That is, when the pulse rotor 17, which is externally fitted and fixed to the inner end of the inner ring 4 on the outer peripheral surface of the hub 1 with the rotation of the wheel, rotates, the through hole 24 in the inner half of the pulse rotor 17
The output of the sensor 22 facing 24 changes. Since the frequency at which the output of the sensor 22 changes is proportional to the rotation speed of the wheel, if the output signal of the sensor 22 is input to a controller (not shown), the rotation speed of the wheel is obtained, and ABS and TC are obtained.
S can be controlled appropriately.

Further, in the case of the rolling bearing unit with a sensor according to the present invention, a plug provided at an end of a lead wire for extracting a signal from the sensor 22 is inserted into the connector 25, thereby connecting the lead wire and the sensor 22. 3 by moving the plug in the circumferential direction and approaching the connector 25 as shown by the arrow α in FIG. Therefore, the above-mentioned conductor and the connector 2
5 can be connected without being disturbed by the constant velocity joint 16.

[0027]

[Effect of the Invention] The present invention is constructed and operated as described above, so that the mounting work to the suspension device can be facilitated even for a rolling bearing unit with a sensor for driving wheels.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a support frame incorporating a sensor.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a sectional view showing a conventional example.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Hub 2 Flange 3a Inner ring track 3b Inner ring track 4 Inner ring 5 Male screw part 6 Nut 7 Outer ring 8 Seal material 9 Attachment part 10a Outer ring track 10b Outer ring track 11 Rolling element 12 Pulse rotor 13 Cover 14 Sensor 15 Conducting wire 16 Constant velocity joint 17 Pulse Rotor 18 Support frame 19 Mounting part 20 Flange part 21 Holding part 22 Sensor 23 Detection part 24 Through-hole 25 Connector

Claims (1)

(57) [Scope of request for utility model registration] A hub provided with a flange for fixing a wheel at an outer end, an inner raceway on an outer peripheral surface, and a mounting portion for supporting a suspension device on an outer peripheral surface, and an outer race on an inner peripheral surface. An outer ring forming a raceway, a plurality of rolling elements provided between the inner raceway and the outer raceway, a sensor supported by the outer race, and an inner end of the hub facing a detecting portion of the sensor. In a sensor-equipped rolling bearing unit having a pulse rotor fixed to a portion thereof, a ring-shaped support frame made of a metal plate and entirely fitted and fixed to the inner end of the outer ring; A holding portion provided on the inner side surface portion so as not to protrude inward in the diameter direction from the inner peripheral edge of the support frame, and provided in a state protruding from the inner side surface, while holding the sensor on the holding portion; , A connector for connecting the conductor for signal extraction of this sensor A rolling bearing unit with a sensor, wherein a bearing is provided on a circumferential end surface of the holding portion.