JP2017015221A - Rolling bearing with sensor, motor, vehicle and machine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a circuit board which can be manufactured in a short time, in a rolling bearing with a sensor.SOLUTION: In a rolling bearing with a sensor having a structure in which a sensor part is arranged at an end of the bearing in an axial direction, a magnet is connected and coupled to an inner ring, a magnetism sensitive sensor is connected and coupled to an outer ring via at least a sensor housing, a circuit board is attached to the sensor housing, a board penetration hole is formed at the circuit board, and a part of the sensor housing is inserted into the board penetration hole. Preferably, the sensor part has a sensor cover at an external surface of at least a part of the sensor part, a cover penetration hole is formed at the sensor cover, and a part of the sensor housing is also inserted into the cover penetration hole. Preferably, a part of the sensor cover has a recess which is recessed to the circuit board side, and the cover penetration hole is located at a bottom of the recess.SELECTED DRAWING: Figure 1

Description

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

  As a conventional technique, there is a rolling bearing with a rotation sensor described in Patent Document 1. In this rolling bearing with a rotation sensor, the circuit board is sealed and fixed with a mold resin.

Japanese Patent Laying-Open No. 2015-094454

  In such a fixing structure, it is necessary to go through a process of injecting a heated mold resin, and it takes time to manufacture. The present invention provides a circuit board fixing structure that can be manufactured in a short time.

(1) A structure in which a sensor part is arranged at an end part in the bearing axial direction,
A magnet is connected to the inner ring,
A magnetically sensitive sensor is coupled to the outer ring via at least a sensor housing,
A circuit board is attached to the sensor housing,
The circuit board has a substrate through hole,
A part of the sensor housing is inserted into the substrate through-hole.
(2) The sensor unit has a sensor cover on at least a part of the outer surface thereof,
The sensor cover has a cover through hole,
The sensor-equipped rolling bearing according to (1), wherein a part of the sensor housing is also inserted into the cover through hole.
(3) A part of the sensor cover has a recessed portion that is recessed toward the circuit board, and the cover through hole is a rolling bearing with a sensor according to (2), which is located at the bottom of the recessed portion.
(4) A part of the sensor housing has a columnar portion protruding in a columnar shape, and the columnar portion is inserted through the substrate through hole and the cover through hole. A rolling bearing with a sensor according to any one of the above.
(5) The sensor-equipped rolling bearing according to (4), wherein the columnar portion has a large-diameter portion that is larger in diameter than the cover through-hole on the tip side. Motor equipped with a rolling bearing with sensor.
(7) A vehicle including the sensor-equipped rolling bearing according to (1) to (5).
(8) A machine device comprising the sensor-equipped rolling bearing according to (1) to (5).

  According to the present invention, the circuit board fixing structure can be manufactured in a short time.

It is a figure which shows embodiment which concerns on this invention. It is a principal part enlarged view of FIG.

  Hereinafter, the present invention will be described in more detail with reference to the drawings with reference to embodiments for carrying out the invention (hereinafter referred to as embodiments). In addition, this invention is not limited at all by this embodiment. In addition, constituent elements in the following description include those that are substantially the same as those that can be assumed by those skilled in the art, that is, those in an equivalent range.

  FIG. 1 is a view showing an embodiment which is an example of a rolling bearing 10 with a sensor according to the present invention. Usually, an inner ring 11 that is externally fitted to the shaft and rotates, an outer ring 12 that is usually fitted and fixed to the housing, and an inner ring raceway and an outer ring raceway formed on the outer peripheral surface of the inner ring 11 and the inner peripheral surface of the outer ring 12 respectively. It has a ball or roller that is a rolling element 13 that rolls along, and a cage that holds the rolling element 13, and functions as a sensor of the sensor-equipped rolling bearing 10 at one end in the axial direction 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 that supports the magnet 34, a magnetic sensor 33, a sensor housing 35 that supports the magnetic sensor 33, and a sensor housing 35 that supports the sensor housing 35. The sensor cover 31 is covered, and the circuit board 36 is provided with a circuit for performing signal processing.

  In detail, the following configuration may be used. 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 connected and coupled to the inner ring 11. The magnetic sensitive sensor 33 is composed of a Hall IC or an MR sensor. The sensor housing 35 is made of an annular thermoplastic resin and is attached to the sensor cover 31 to support the magnetic sensitive sensor 33. The sensor cover 31 is made of an annular magnetic body and is attached to the outer ring 12 to support the sensor housing 35. That is, the magnetic sensor 33 is coupled to the outer ring 12.

  Further, it may have the following characteristics. The sensor unit 30 is arranged at the end in the bearing axial direction. A magnet 34 is connected to the inner ring 11 and a magnetic sensor 33 is connected to the outer ring 12 via at least the sensor housing 35. A circuit board 36 is attached.

  FIG. 2 is an enlarged view of a main part of the part A shown in FIG. The circuit board 36 has a board through hole 36b, and a part of the sensor housing 35 is inserted into the board through hole 36b.

  Preferably, the sensor unit 30 has a sensor cover 31 on at least a part of the outer surface thereof, the sensor cover 31 has a cover through hole 31b, and a part of the sensor housing 35 is also in the cover through hole 31b. It is inserted.

  Preferably, a part of the sensor cover 31 has a recess 31c that is recessed toward the circuit board 36, and the cover through hole 31b is at the bottom of the recess 31c.

  Preferably, a part of the sensor housing 35 has a columnar portion 35d protruding in a columnar shape, and the columnar portion 35d is inserted into the substrate through hole 36b and the cover through hole 31b. This is formed by having a columnar portion 35d formed in advance in the sensor housing 35 and inserting the columnar portion 35d into the substrate through hole 36b and the cover through hole 31b.

  Preferably, the columnar portion 35d has a large-diameter portion 35e having a diameter larger than the inner diameter of the cover through-hole 31b on the tip side. This can be formed by performing ultrasonic welding after inserting the columnar portion 35d through the substrate through hole 36b and the cover through hole 31b.

  The sensor-equipped rolling bearing 10 shown in the above embodiment has a structure that is resistant to vibration and magnetic noise, and therefore can be used to support the rotating shaft of a motor.

  The sensor-equipped rolling bearing 10 shown in the above embodiment has a structure that is resistant to vibration and magnetic noise, and therefore can be used to support a rotating shaft in a vehicle.

  The sensor-equipped rolling bearing 10 shown in the above embodiment has a structure that is resistant to vibration and magnetic noise, and therefore can be used to support a rotating shaft in a mechanical device.

DESCRIPTION OF SYMBOLS 10 Rolling bearing with a sensor 11 Inner ring 12 Outer ring 13 Rolling body 30 Sensor part 31 Sensor cover 31b Cover through-hole 31c Recessed part 32 Magnet holder 33 Magnetic sensitive sensor 34 Magnet 35 Sensor housing 35d Column-shaped part 35e Large diameter part 36 Circuit board 36b Substrate through-hole

Claims (8)

It is a structure that arranges the sensor part at the bearing axial direction end,
A magnet is connected to the inner ring,
A magnetically sensitive sensor is coupled to the outer ring via at least a sensor housing,
A circuit board is attached to the sensor housing,
The circuit board has a substrate through hole,
A part of the sensor housing is inserted into the substrate through-hole. The sensor unit has a sensor cover on at least a part of the outer surface thereof,
The sensor cover has a cover through hole,
The rolling bearing with a sensor according to claim 1, wherein a part of the sensor housing is inserted into the cover through hole.   3. The rolling bearing with a sensor according to claim 2, wherein a part of the sensor cover has a recessed portion recessed toward the circuit board, and the cover through-hole is at a bottom portion of the recessed portion.   A part of the sensor housing has a columnar portion protruding in a columnar shape, and the columnar portion is inserted into the substrate through hole and the cover through hole. Rolling bearing with sensor as described.   The rolling bearing with a sensor according to claim 4, wherein the columnar portion has a large-diameter portion having a diameter larger than that of the cover through-hole on a tip end side thereof.   The motor provided with the rolling bearing with a sensor of any one of Claims 1-5.   The vehicle provided with the rolling bearing with a sensor of any one of Claims 1-5.   A mechanical device comprising the sensor-equipped rolling bearing according to any one of claims 1 to 5.

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