JP2007198456A - Bearing with rotary sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing with a rotary sensor in which deformation or damage does not occur when incorporating a resin support component holding a sensor into the bearing and which can simply and safely incorporate the component into the bearing. <P>SOLUTION: An encoder 8 is mounted on either one of an inner race and an outer race of a roller bearing 1. The annular resin support component 10 having the sensor 9 incorporated therein facing the encoder 8 is fitted to abut an end face 3b side of the other race 3. A reinforcement pin 13 is provided to the resin support component 10 over a side face contacting the end face 3b of the race 3 and a side face which is a back side of the side face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bearing with a rotation sensor installed in a motor, an engine, and other various devices.

As a conventional example of this type of bearing with a rotation sensor, as shown in FIG. 4, an encoder 28 as a detected portion is attached to an inner ring 22 that is a rotation side raceway of a rolling bearing 21 and an outer ring that is a fixed side raceway. 23 includes an encoder 28 attached with an annular resin support part 30 in which a sensor 29 facing in the radial direction is incorporated (for example, Patent Document 1). According to this, as the inner ring 22 rotates, the sensor 29 converts it into an electrical signal proportional to the rotational speed and outputs it.
JP-A-10-132603

  However, in the bearing with the rotation sensor having the above-described configuration, when the bearing is incorporated into the housing 16 as shown in FIG. For this reason, a pressing force is applied to the resin support component 30 to cause deformation or breakage, and the output accuracy of the sensor may be deteriorated. If the support part 30 is made of metal, the deformation of the support part 30 at the time of pushing-in is prevented, but it is difficult to incorporate the sensor 29 into the support part 30, and it is difficult to attach the support part 30 to the bearing.

  The object of the present invention is that the mounting of the sensor to the support component and the mounting operation of the support component to the bearing are easy, and there is no deformation or breakage when the completed bearing with the rotation sensor is assembled to the housing. A bearing with a rotation sensor can be easily and safely incorporated into the housing.

In the bearing with a rotation sensor according to the present invention, an encoder is attached to one of the inner and outer races of the rolling bearing, and an annular resin support part incorporating a sensor facing the encoder is connected to the other bearing through a cored bar. In a bearing with a rotation sensor fitted in a state in contact with the end face of the bearing ring, the resin support component is reinforced over the side face that is in contact with the end face of the bearing ring via a cored bar and the side face that is the back side of the side face. A pin is provided.
According to this configuration, when the resin support part is pushed with a jig and the bearing with the rotation sensor is incorporated into the housing, the reinforcing pin hits the jig. For this reason, the pushing force is transmitted to the end face of the raceway ring through the reinforcing pin via the core metal, and no pushing force is applied to the resin support component. As a result, the resin support parts are not deformed or damaged during the assembly. For this reason, the sensor can be easily and safely incorporated into the bearing without deteriorating the detection accuracy of the sensor.

  In the bearing with a rotation sensor according to the present invention, an encoder is attached to one of the inner and outer races of the rolling bearing, and an annular resin support part incorporating a sensor facing the encoder is connected to the other bearing through a cored bar. In a bearing with a rotation sensor fitted in a state in contact with the end face of the bearing ring, the resin support component is reinforced over the side face that is in contact with the end face of the bearing ring via a cored bar and the side face that is the back side of the side face. Since the pins are provided, the sensor support can be easily and safely incorporated into the bearing without deformation or breakage when the resin support part holding the sensor is incorporated into the bearing.

  An embodiment of the present invention will be described with reference to FIGS. As shown in the sectional view of FIG. 1A, this rotation sensor-equipped bearing includes a rolling bearing 1 having a rotating raceway 2 and a stationary raceway 3 that are rotatable with respect to each other via a plurality of rolling elements 4, The rotation sensor 7 is attached to one end of the rolling bearing 1. The rotation sensor 7 includes an encoder 8 attached to one end portion of the rotation side raceway ring 2 and a sensor 9 incorporated in an annular resin support part 10 attached to one end portion of the fixed side raceway ring 3. Here, the inner ring 2 is a rotating side raceway, the outer ring 3 is a stationary side raceway, the encoder 8 is attached to the inner race 2, and the sensor 9 is attached to the outer race 3.

  The encoder 8 is a radial-type detected portion that faces the sensor 9 in the radial direction, and is provided, for example, on the outer peripheral side of an annular metal support member 11 that is press-fitted to the outer peripheral surface of the inner ring 2. It is made of an annular permanent magnet. The permanent magnet in this case constituting the encoder 8 is magnetized by alternately arranging magnetic poles N and S in the circumferential direction.

  The sensor 9 incorporated in the resin support component 10 is a magnetic sensor made of, for example, a Hall element, and is disposed so as to face the encoder 8 in the radial direction, and the magnetic pole of the encoder 8 accompanying the rotation of the inner ring 2. Detect changes. From this detection signal, the rotation angle or the number of rotations of the inner ring 2 can be known. A detection signal of the sensor 9 is output to the outside through a cable 12 connected to the sensor 9 and drawn from the resin support component 10.

  As shown in an enlarged cross-sectional view in FIG. 2, the resin support component 10 is attached to the core metal 14 in a state of contacting the end surface of the outer ring 3 via the core metal 14 fitted to the inner peripheral surface of the outer ring 3. Mating. As shown in FIG. 1A, a cylindrical reinforcing pin 13 is embedded in the resin support component 10 so as to be in contact with the end surface of the outer ring 3 through the core metal 14 and the side surface that is the back side of the side surface. Is provided. The reinforcing pin 13 may have a shape other than a cylindrical shape. A plurality of reinforcing pins 13 are distributed in the circumferential direction of the resin support component 10 as shown in FIG. The reinforcing pin 13 has a shape having a flange at the end facing the end surface of the outer ring 3.

  As shown in FIG. 2, a resin support part 10 is attached to the outer ring 3. A cylindrical surface is provided on the inner peripheral surface on the end face side, and the resin support part 10 is press-fitted and fixed to the cylinder surface via a core metal 14. Is done.

  The rolling bearing 1 is a deep groove ball bearing, and the raceway surfaces 2a and 3a of the rolling element 4 are formed on the outer diameter surface of the inner ring 2 and the inner diameter surface of the outer ring 3, respectively. The rolling element 4 is held by a cage 5. Has been. The annular space between the inner ring 2 and the outer ring 3 is sealed with a seal member 6 at the end opposite to the installation side of the rotation sensor 7.

  According to the bearing with the rotation sensor having this configuration, the annular resin support component 10 in which the sensor 9 is incorporated is press-fitted and fixed to the inner peripheral surface of the bearing outer ring 3 via the core metal 14. A reinforcing pin 13 is provided across a side surface that is in contact with the end surface 3b of the outer ring 3 via the core bar 14 and a side surface that is the back side of the side surface. Therefore, even when a pressing force is applied to the resin support component 10 when the bearing with the rotation sensor is assembled into the housing 16 with the pressing jig 15 as shown in FIG. 3, the pressing force is applied to the outer ring via the cored bar through the reinforcing pin 13. 3 and no force is applied to the resin support component 10. Therefore, the resin support component 10 in which the sensor 9 is incorporated is not deformed or damaged, and the output accuracy of the sensor 9 is not deteriorated. This is the same even when the outer diameter of the resin support component 10 is equal to or larger than the outer diameter of the rolling bearing 1.

  Further, since the reinforcing pin 13 is provided with a flange, the reinforcing pin 13 does not come out of the resin support part 10 after the bearing is assembled, and the assembly becomes easy.

  In the above embodiment, the encoder 8 is mounted on the inner ring 2 side of the rolling bearing 1 and the resin support component 10 is mounted on the outer ring 3 side. However, the resin support component 10 is mounted on the inner ring 2 side and the outer ring is mounted. An encoder 8 may be attached to the third side. Further, the encoder 8 and the sensor 9 constituting the rotation sensor 7 are not limited to the radial type arrangement example facing the radial direction as in the above embodiment, but the thrust type arrangement example facing the axial direction. It may be.

(A) is sectional drawing of the bearing with a rotation sensor concerning one Embodiment of this invention, (B) is the same side view. It is an expanded sectional view of resin support parts in the bearing with the same rotation sensor. It is explanatory drawing of the assembly | attachment work to the housing of the same bearing with a rotation sensor. It is explanatory drawing of the assembly | attachment work to the housing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rolling bearing 2 ... Rotation side bearing ring (inner ring)
3 ... Fixed side race (outer ring)
3b ... Bearing outer ring end face 7 ... Rotation sensor 8 ... Encoder 9 ... Sensor 10 ... Resin support part 13 ... Reinforcement pin 14 ... Core

Claims (2)

Attach an encoder to either the inner or outer ring of the rolling bearing, and place the annular resin support part with a sensor facing the encoder in contact with the end face of the other bearing ring through the core. In the fitted bearing with rotation sensor,
A bearing with a rotation sensor, wherein the resin support part is provided with a side surface that contacts the end surface of the raceway ring via a cored bar and a reinforcing pin that extends across the side surface that is the back side of the side surface.   The bearing with a rotation sensor according to claim 1, wherein a flange shape is provided on one end face of the reinforcing pin.

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