JP6547543B2 - Sensor-equipped rolling bearing, motor, vehicle and mechanical device - Google Patents

Description

  The present invention relates to a sensor-equipped rolling bearing, and a motor, a vehicle, and a mechanical device provided with the sensor-equipped rolling bearing.

  As a prior art, the rolling sensor with a rotation sensor of patent document 1 is mentioned. In the rolling bearing with the rotation sensor, the sensor portion is fixed to the inner periphery of the outer ring.

JP, 2015-094454, A

In such a fixed structure, removal of the sensor unit is often difficult. An object of the present invention is to facilitate removal of a sensor unit.

(1) The sensor unit is arranged at the axial axial end of the bearing,
The magnet is connected and coupled to the inner ring,
A magnetic sensor is connected and coupled to the outer ring,
The sensor cover is fixed to the outer ring outer circumference,
The outer ring outer periphery has a circumferential groove,
The sensor cover has a tool hooking portion at the end on the mounting side to the outer ring. A sensor-equipped rolling bearing.
(2) The sensor equipped rolling bearing according to (1), wherein the tool hooking portion is a tapered portion in which the thickness of the sensor cover is changed.
(3) The sensor mounted rolling bearing according to (1) or (2), wherein the outer ring outer periphery is divided into a large diameter portion and a small diameter portion via the circumferential groove.
(4) The sensor equipped rolling bearing according to (3), wherein the difference between the radius of the large diameter portion and the radius of the small diameter portion is equal to or greater than the thickness of the sensor cover.
(5) The sensor equipped rolling bearing according to any one of (3) or (4), wherein a part of the sensor cover is in contact with an outer peripheral surface of the small diameter portion.
(6) The sensor mounted rolling bearing according to any one of (1) to (5), wherein an end of the sensor cover is in the circumferential groove.
(7) A motor provided with the sensor-equipped rolling bearing according to (1) to (6).
(8) A vehicle comprising the sensor equipped rolling bearing according to any one of (1) to (6).
(9) A mechanical device provided with the sensor-equipped rolling bearing according to any one of (1) to (6).

  According to the present invention, removal of the sensor unit can be facilitated.

It is a figure showing an embodiment concerning the present invention. It is a principal part enlarged view of FIG. It is a figure which shows the use condition of a tool by the same part as FIG. It is a figure which shows a dimensional relationship by the same part as FIG.

  Hereinafter, the present invention will be described in more detail by way of embodiments (hereinafter referred to as embodiments) for carrying out the invention with reference to the drawings. The present invention is not limited at all by this embodiment. Further, constituent elements in the following description include substantially the same ones within the range that can be conceived by those skilled in the art, that is, so-called equivalent ranges.

  FIG. 1 is a view showing an embodiment which is an example of a sensor-equipped rolling bearing 10 according to the present invention. The inner ring raceway and the outer ring raceway formed on the outer ring 12 which is normally fitted inside and fixed to the housing, and the outer circumferential surface of the inner ring 11 and the inner circumferential surface of the outer ring 12, respectively It has balls or rollers, which are rolling elements 13 rolling along, and a cage that holds the rolling elements 13, and functions as a sensor of the sensor-equipped rolling bearing 10 at one axial end of the inner ring 11 and the outer ring 12 A sensor unit 30 is provided.

  The sensor unit 30 includes at least a magnet 34, a magnet holder 32 for supporting the magnet 34, a magnetically sensitive sensor 33, a sensor cover 31 for supporting the magnetically sensitive sensor 33 and covering the outside, and a circuit for performing signal processing. And the substrate 36 provided.

  Also, in detail, the following configuration may be adopted. The magnet 34 is an annular multipolar magnet. The magnet holder 32 is made of an annular magnetic body and is attached to the inner ring 11 to support the magnet 34. That is, the magnet 34 is coupled and coupled to the inner ring 11. The magnetic sensor 33 is made of a Hall IC or an MR sensor. The sensor cover 31 is made of an annular magnetic body and is attached to the outer ring 12 to support the magnetic sensitive sensor 33. That is, the magnetically sensitive sensor 33 is connected and coupled to the outer ring 12.

  Furthermore, the following features may be provided. The sensor cover 31 is fixed to the outer ring outer periphery, and the outer ring outer periphery has a circumferential groove 20. The sensor cover 31 has a tool hooking portion at the end on the attachment side to the outer ring 12.

  FIG. 2 is an enlarged view of an essential part of the part A shown in FIG. The tool hooking portion is easy to manufacture if it is a tapered portion 31 d in which the thickness of the sensor cover 31 is changed.

  The outer periphery of the outer ring may be divided into a large diameter portion 14 and a small diameter portion 15 via a circumferential groove 20. The sensor cover 31 may be fixed to the small diameter portion 15.

  3 is an enlarged view of an essential part of the A portion shown in FIG. 1 as in FIG. 2 and is a schematic view when the sensor unit 30 (see FIG. 1) is removed. A tool 40 such as a spatula or a flathead screwdriver is hooked on the tool hooking portion (for example, the tapered portion 31d of FIG. 2) of the sensor cover 31 and a force is applied in the direction of the arrow in FIG. The sensor unit 30 can be removed by deforming in the direction outward. At this time, the portion in contact with the large diameter portion 14 of the tool 40 is a fulcrum, and the portion in contact with the tool hooking portion of the tool 40 is a leverage point. As described above, since the sensor unit 30 can be removed, for example, when a defect is found in the sensor unit 30 in factory inspection, the sensor unit 30 can be easily replaced.

  Similarly to FIG. 2, FIG. 4 is also an enlarged view of the main part of the part A shown in FIG. 1 and is a schematic view showing a dimensional relationship. The difference t1 between the radius of the large diameter portion 14 and the radius of the small diameter portion 15 may be equal to or greater than the thickness t2 of the sensor cover 31. This configuration can prevent the sensor cover 31 from protruding in the radial direction. Further, by making the difference t1 of the radius of the large diameter portion 14 and the small diameter portion 15 equal to the thickness t2 of the sensor cover 31, the sensor cover 31 can receive a load in the radial direction.

  A portion of the sensor cover 31 may be in contact with the outer peripheral surface of the small diameter portion 15. With such a configuration, more accurate positioning arrangement becomes possible.

  Also, the end 31 a of the sensor cover may be in the circumferential groove 20. This can be realized by caulking from the outer peripheral side when the sensor cover 31 is attached. With such a configuration, the sensor cover 31 can be attached to the outer ring 12 more reliably, and the sensor portion 30 can be attached to the outer ring 12 more reliably.

  The sensor-equipped rolling bearing shown in the above embodiment has a structure resistant to vibration and magnetic noise, so it can also be used to support the rotating shaft of a motor.

  The sensor-equipped rolling bearing shown in the above embodiment has a structure resistant to vibration and magnetic noise, and therefore can be used for supporting a rotating shaft in a vehicle.

  The sensor-equipped rolling bearing shown in the above embodiment has a structure that is resistant to vibration and magnetic noise, so it can also be used to support a rotary shaft in a mechanical device.

DESCRIPTION OF SYMBOLS 10 rolling bearing with sensor 11 inner ring 12 outer ring 13 rolling element 14 large diameter portion 15 small diameter portion 20 circumferential groove 30 sensor portion 31 sensor cover 31 a end portion of sensor cover 31 d tapered portion 32 magnet holder 33 magnetically sensitive sensor 34 magnet 36 substrate 40 Tool t1 Difference in radius between large diameter part and small diameter part t2 Thickness of sensor cover

Claims (9)

The sensor unit is arranged at the axial end of the bearing,
The magnet is connected and coupled to the inner ring,
A magnetic sensor is connected and coupled to the outer ring,
The sensor cover is fixed to the outer ring outer circumference,
The outer ring outer periphery has a circumferential groove,
A sensor-equipped rolling bearing having a tool hooking portion at the tip on the attachment side to the outer ring, the sensor cover deforming the sensor cover radially outward by hooking a tool and removing the sensor cover .   The sensor-equipped rolling bearing according to claim 1, wherein the tool hooking portion is a tapered portion in which a thickness of the sensor cover is changed.   The sensor-equipped rolling bearing according to claim 1, wherein the outer ring outer periphery is divided into a large diameter portion and a small diameter portion via the circumferential groove.   The sensor-equipped rolling bearing according to claim 3, wherein the difference between the radius of the large diameter portion and the radius of the small diameter portion is equal to or greater than the thickness of the sensor cover.   The sensor-equipped rolling bearing according to claim 3, wherein a part of the sensor cover is in contact with an outer peripheral surface of the small diameter portion.   The sensor-equipped rolling bearing according to any one of claims 1 to 5, wherein an end of the sensor cover is in the circumferential groove.   A motor comprising the sensor-equipped rolling bearing according to any one of claims 1 to 6.   A vehicle comprising the sensor equipped rolling bearing according to any one of claims 1 to 6.   A mechanical device comprising the sensor-equipped rolling bearing according to any one of claims 1 to 6.

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