JPH0543074U - Rolling bearing unit with sensor - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent interference between the plug connected to the connector 25 and the constant velocity joint. As a result, it is possible to adopt a connection structure using a connector also in the signal take-out portion of the rolling bearing unit with a sensor for driving wheels. [Structure] A support frame 18 is supported and fixed to an outer ring on a fixed side. The sensor 2 is attached to the holding portion 21 protruding from the inner surface of the support frame 18.
Hold 2 The connector 2 is attached to the circumferential end surface of the holding portion 21.
5 is provided so that the plug connected to the end of the conductor can be inserted and connected to the connector 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior Art]

 Conventionally, a vehicle wheel is rotatably supported with respect to a suspension system, and the rotation speed of the wheel is conventionally detected in order to control an anti-lock brake system (ABS) or a traction control system (TCS). For example, there is known a rolling bearing unit with a sensor as described in JP-A-3-39161.

The rolling bearing unit with a sensor described in the above publication is constructed as shown in FIG. A hub 2 is provided with a wheel fixing flange 2 at the outer end (the outer end is the outer end in the width direction when mounted on an automobile, the left end in FIG. 4), and the outer periphery of the middle part. An inner ring raceway 3a is formed on the surface. An inner ring 4 having an inner ring raceway 3b on the outer peripheral surface is externally fitted to the outer peripheral surface of the intermediate portion of the hub 1.

A male screw portion formed on the outer peripheral surface of the inner end portion of the hub 1 (the inner end means a portion that becomes the end portion on the center side in the width direction when mounted on an automobile, the right end portion in FIG. 4). A nut 6 is screwed on the screw 5. The nut 6 is screwed and tightened on the male screw portion 5 to press 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 ring 7 has a mounting portion 9 for supporting a knuckle (not shown) of a suspension device formed on the outer peripheral surface thereof, and double rows of outer ring raceways 10a, 10b formed on the inner peripheral surface thereof. There is. A plurality of rolling elements 11, 11 are provided between the outer ring raceways 10a, 10b and the inner ring raceways 3a, 3b, respectively, and are provided on the inner side of the outer ring 7 supported by the suspension device by the mounting portion 9. The hub 1 is rotatably supported.

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

In the rolling bearing unit with a sensor as described above, the wheel fixed to the flange 2 provided on the outer end portion 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 as the wheels rotate, the output of the sensor 14 facing the pulse rotor 12 changes. The frequency at which the output of the sensor 14 changes is proportional to the rotational speed of the wheel. Therefore, if the output signal of the sensor 14 is taken out by the lead wire 15 and input to a controller (not shown), the rotational speed of the wheel is calculated, It can control ABS and TCS appropriately.

[0009]

[Problems to be solved by the device]

 By the way, in the conventional rolling bearing unit with a sensor configured and operating as described above, the lead wire 15 for taking out a signal from the sensor 14 is led inward (to the right in FIG. 4). The conducting wire 15 and the constant velocity joint 16 for rotating the hub 1 (see FIG. 1 showing the embodiment of the present invention) are likely to interfere with each other.

In particular, the sensor 14 is provided with a connector in order to eliminate the trouble of mounting the rolling bearing unit with a sensor with the long conductor 15 attached to the suspension device and to improve the convenience of the mounting work to the vehicle body. When the rolling bearing unit with sensor is attached to the suspension system and the plug provided at the end of the lead wire is connected to this connector, the plug is inserted due to interference with the constant velocity joint 16. I can't plug it into the connector.

Therefore, as described in, for example, US Pat. No. 4,904,936, a rolling bearing unit with a sensor for supporting the driven wheel and detecting the rotational speed of the driven wheel has a conductor connecting portion. Although it is possible to install a connector on the drive wheel, it is not possible to install a connector on the lead wire connection part of the rolling bearing unit with a sensor for the drive wheel, and the lead wire is directly connected to the sensor. As described above, this lead wire hinders the work of attaching the rolling bearing unit with sensor to the suspension device.

The rolling bearing unit with a sensor of the present invention is designed to address the above-mentioned problems.

[0013]

[Means for solving the problem]

 The rolling bearing unit with a sensor of the present invention is similar to the above-described conventional rolling bearing unit with a sensor, and has a wheel fixing flange at the outer end, an inner ring raceway at the outer peripheral surface, a hub provided with each, and a suspension. An outer ring having a mounting portion for supporting the device on the outer peripheral surface and an outer ring raceway formed on the inner peripheral surface, a plurality of rolling elements provided between the inner ring raceway and the outer ring raceway, and the outer ring. The sensor includes a supported sensor and a pulse rotor fixed to a portion of the inner end of the hub facing the detecting portion of the sensor.

Further, in the rolling bearing unit with a sensor according to the present invention, a support frame which is made of a metal plate and has a generally annular shape and which is fitted and fixed to the inner end portion of the outer ring, and an inner side surface portion of the support frame. And a holding portion provided so as not to project inward in the diametrical direction from the inner peripheral edge of the support frame and project from the inner side surface. The holding part is provided with a connector for holding the sensor and connecting a conductor for taking out a signal of the sensor on the circumferential end face of the holding part.

[0015]

[Action]

 The rolling bearing unit with a sensor of the present invention configured as described above rotatably supports the wheel with respect to the suspension device, and the action itself when detecting the rotational speed of the wheel fixed to the hub is the same. The same as the conventional rolling bearing unit with a sensor described above.

Further, in the case of the rolling bearing unit with a sensor of the present invention, by inserting the plug provided at the end of the conductor into the connector, the work of connecting the conductor and the sensor is performed by moving this plug in the circumferential direction. Since this is done by bringing the connector closer to the connector, this connection work can be done without being disturbed by the constant velocity joint.

[0017]

【Example】

 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 hub 1 (the left end in FIG. 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 fitted and fixed to the hub 1, respectively. The inner end portion of the inner ring 4 is made to project slightly from the inner end surface of the hub 1 and is brought into contact with the outer end surface of a constant velocity joint 16 for rotationally driving the hub 1.

The outer half of the cylindrical pulse rotor 17 is externally fitted and fixed to the outer peripheral surface of the inner end portion of the inner ring 4. A large number of through holes 24, 24 having the same size are formed at equal intervals in the inner half of the pulse rotor 17 in the portion projecting from the inner end surface of the inner ring 4 in the circumferential direction. ..

On the outer peripheral surface of the outer ring 7, a mounting portion 9 for fixing the outer ring 7 to a knuckle (not shown) of a suspension device is provided. Further, outer ring raceways 10a, 10b are formed on the inner peripheral surface of the outer ring 7 so as to face the inner ring raceways 3a, 3b on the outer peripheral surfaces of the hub 1 and the inner ring 4, respectively. A plurality of rolling elements 11, 11 are provided between the pair of inner ring raceways 3a, 3b and the pair of outer ring raceways 10a, 10b, respectively, to freely rotate the hub 1 inside the outer ring 7. There is.

Sealing materials 8, 8 are mounted between the inner peripheral surfaces of the inner and outer ends of the outer ring 7 and the outer peripheral surfaces of the hub 1 and the inner ring 4 so that the inner peripheral surface of the outer ring 7 and the hub 1 It exists between the outer peripheral surface of the inner ring 4 and closes the openings at both ends of the space in which the plurality of rolling elements 11, 11 are provided.

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

A sensor 22 is externally fitted to and held by the holding portion 21 from an inner peripheral side opening portion of the holding portion 22, and a detection portion 23 of the sensor 22 is held by the inner half portion of the pulse rotor 17. , Is opposed to the portion where a large number of through holes 24, 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 portion of a conductor wire (not shown) is connected and fixed to the connector 25, whereby the sensor 22 is provided. The detected signal can be taken out freely. As shown in FIG. 3, the connector 25 is provided between the inner and outer peripheral edges of the support frame 18 in the circumferential direction of the support frame 18.

The rolling bearing unit with a sensor of the present invention configured as described above rotatably supports the wheel with respect to the suspension device and detects the rotational speed of the wheel fixed to the flange 2 of the hub 1. The action itself at this time is almost the same as that of the conventional rolling bearing unit with a sensor described above.

That is, when the pulse rotor 17, which is fitted and fixed to the inner end portion of the inner ring 4 on the outer peripheral surface of the hub 1 as the wheel rotates, rotates, the through holes 24, 24 in the inner half of the pulse rotor 17 The output of the facing sensor 22 changes. The frequency at which the output of the sensor 22 changes is proportional to the rotational speed of the wheel. Therefore, if the output signal of the sensor 22 is input to a controller (not shown), the rotational speed of the wheel can be obtained and ABS and TCS can be properly adjusted. It can be controlled.

Further, in the case of the rolling bearing unit with a sensor of the present invention, the conductor is connected to the sensor 22 by inserting the plug provided at the end of the conductor for extracting the signal of the sensor 22 into the connector 25. The work can be performed by moving the plug in the circumferential direction and bringing it closer to the connector 25 as shown by an arrow α in FIG. Therefore, the work of connecting the above-mentioned conducting wire and the connector 25 can be performed without being disturbed by the constant velocity joint 16.

[0027]

[Effect of the device]

 Since the present invention is constructed and operates as described above, even if a rolling bearing unit with a sensor for a drive wheel is used, the work of attaching it to the suspension device can be facilitated.

[Brief description of 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 on arrow A of FIG.

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

[Explanation of sign]

 1 hub 2 flange 3a inner ring raceway 3b inner ring raceway 4 inner ring 5 male screw part 6 nut 7 outer ring 8 seal material 9 mounting part 10a outer ring raceway 10b outer ring raceway 11 rolling element 12 pulse rotor 13 cover 14 sensor 15 conductor wire 16 constant velocity joint 17 pulse Rotor 18 Support frame 19 Mounting part 20 Collar part 21 Holding part 22 Sensor 23 Detection part 24 Through hole 25 Connector

Claims (1)

[Scope of utility model registration request] 1. A hub for mounting a wheel on an outer end portion, an inner ring raceway on an outer peripheral surface, and a mounting portion for supporting a suspension device on the outer peripheral surface, and an outer ring on the inner peripheral surface. An outer ring that forms a raceway, a plurality of rolling elements provided between the inner ring raceway and the outer ring raceway, a sensor supported by the outer ring, and an inner end portion of the hub that faces the detection unit of the sensor. In a rolling bearing unit with a sensor including a pulse rotor fixed to a portion, a metal-made support frame made of a metal plate and fitted and fixed to the inner end of the outer ring, and this support frame The inner side surface portion is provided with a holding portion provided so as not to project inward in the diameter direction from the inner peripheral edge of the support frame and to project from the inner side surface. The holding portion holds the sensor. , A connector for connecting the lead wire for signal extraction of this sensor. A rolling bearing unit with a sensor, wherein a roller is provided on an end face in the circumferential direction of the holding portion.