JP4840246B2 - Method for manufacturing rolling bearing device with sensor - Google Patents

Description

  The present invention relates to a method of manufacturing a rolling bearing device with a sensor.

  Conventionally, when assembling a rolling bearing device having an inner shaft, an inner ring, an outer ring and a ball, variation in the measurement accuracy of the inner shaft, variation in the measurement accuracy of the inner ring, variation in the measurement accuracy of the outer ring, variation in dimensions within the ball standard, It is necessary to measure the dimensions of individual parts in order to cope with changes in the inner ring raceway dimensions caused by press-fitting the inner ring into the inner shaft, changes in the inner shaft, inner ring, ball and outer ring depending on the temperature. There is.

  Here, it takes a lot of time to measure the dimensions of each component, which is an obstacle to shortening the manufacturing time of the rolling bearing device or reducing the manufacturing cost of the rolling bearing device. ing.

  Further, there is a demand for further improving the assembly accuracy of the rolling bearing device.

In addition, regarding the manufacturing method of a rolling bearing device with a sensor having a sensor, the manufacturing method is various in response to the various structures of the sensor, and there is no established manufacturing method. It is.
JP 02-159536 A

  The inventor includes an inner shaft, an inner ring, an outer ring, a ball, and an annular displacement sensor device. The displacement sensor device has an annular target member to be sensed, and an inner peripheral surface of the target member. The following problems exist particularly with respect to a rolling bearing device having a structure in which one end portion in the axial direction is press-fitted into one end portion in the axial direction of the outer peripheral surface of the inner ring.

  First, even if each member is assembled on the basis of the measurement of the dimensions of each component, the rolling bearing device with the sensor generates rotational deflection, and the displacement sensor device cannot perform accurate sensing of the target member. There is a case.

  Furthermore, even if each member is assembled based on the measurement of the dimensions of each component, only one axial end of the inner peripheral surface of the annular target member is connected to one axial end of the outer peripheral surface of the inner ring. In the press-fitted structure, there is a large difference in distortion between the portion of the target member that is press-fitted into the inner ring and the portion of the target member that is not press-fitted into the inner ring, and this is due to the difference in the axial position of the target member after press-fitting. It has been found that the accuracy of the position of the outer peripheral surface of the target member, which is the sensing target of the sensor main body, may become worse due to a large change in the radial dimension. In addition, the position of the sensor-equipped rolling bearing device and the magnitude of the moment load applied to the sensor-equipped rolling bearing device due to the poor accuracy of the position of the outer peripheral surface of the target member can be accurately measured. It can be difficult.

  Therefore, the subject of the present invention is a rolling bearing device with a sensor even if only one axial end portion of the inner peripheral surface of the annular target member is press-fitted into one axial end portion of the outer peripheral surface of the inner ring. And a sensor-equipped rolling bearing device manufacturing method for manufacturing a sensor-equipped rolling bearing device capable of accurately measuring the position of the motor and the moment load applied to the sensor-equipped rolling bearing device.

In order to solve the above problems, a method of manufacturing a rolling device with a sensor according to the present invention is as follows.
A first shaft portion and a second shaft portion that is continuous with the first shaft portion via a step portion, has an outer diameter larger than the outer diameter of the first shaft portion, and has an outer circumferential raceway surface. An inner shaft having
An inner ring that fits to the first shaft portion of the inner shaft and has an outer circumferential raceway surface on the outer circumferential surface;
An outer ring having a first inner circumferential raceway surface and a second inner circumferential raceway surface;
A first rolling element disposed between the first inner raceway surface and the outer raceway surface of the inner ring;
A second rolling element disposed between the second inner raceway surface and the outer raceway surface of the inner shaft;
A sealing device for sealing between the outer ring and the inner ring;
In the axial direction of the inner ring, only one end part in the axial direction of the inner peripheral surface is provided at one end part of the outer peripheral surface of the inner ring that is located on the opposite side of the sealing device from the first rolling element side. A displacement sensor device having an annularly fitted target member and a sensor main body facing the target member in the radial direction of the target member, and detecting the axial and radial displacements of the target member A rolling bearing device with a sensor for manufacturing a rolling bearing device with a sensor comprising:
A first rolling element is disposed between the first inner raceway surface and the outer raceway surface of the inner ring, the second inner raceway surface, and the outer raceway surface of the inner shaft. A second rolling element between
Then, the space between the outer ring and the inner ring is sealed with the sealing device,
The one end of the target member is press-fitted into the one end of the outer peripheral surface of the inner ring,
The one end portion of the target member is press-fitted into the one end portion of the outer peripheral surface of the inner ring, and the inner shaft is moved in a state where the space between the outer ring and the inner ring is sealed by the sealing device. The outer peripheral surface of the target member is processed after being rotated about the central axis of the inner shaft.

  According to the present invention, after the one end of the target member is press-fitted into the one end of the outer peripheral surface of the inner ring, the outer peripheral surface of the target member is processed, and the target member is press-fitted. Since the outer peripheral surface of the target member is processed in a state in which the distortion is caused, the target member is moved to the inner ring as compared with the case where the target member is pressed into the inner ring after the target member is processed. The influence of press fitting does not reach the size of the target member of the sensor-equipped rolling bearing device after manufacture, and the target member can be precisely positioned at a predetermined position.

  According to the invention, after the one end portion of the target member is press-fitted into the one end portion of the outer peripheral surface of the inner ring, the inner shaft is rotated about the central axis of the inner shaft. In this state, the outer peripheral surface of the target member is processed. Compared with the case where the outer peripheral surface of the target member is processed without rotating the inner shaft about the central axis of the inner shaft. In the processing of the outer peripheral surface of the target member, the rotational runout of the sensor-equipped rolling bearing device can be removed, and no rotational shake occurs in the sensor-equipped rolling bearing device after manufacture.

  Therefore, for the above two reasons, the position of the sensor-equipped rolling bearing device and the magnitude of the moment load applied to the sensor-equipped rolling bearing device can be accurately measured.

  Further, according to the present invention, the outer peripheral surface of the target member is processed after the outer ring and the inner ring are sealed with the sealing device, so that the one end of the outer peripheral surface of the inner ring is processed. Even if the outer peripheral surface of the target member is processed after the one end portion of the target member is press-fitted into the part, the wear powder of the target member generated by the processing (including polishing) is generated by rolling elements and tracks. Never reach the surface. Therefore, it is possible to reliably protect the rolling elements and the raceway surface from the wear powder.

  In one embodiment, the inner shaft opens in the center of the end surface on one side of the axial direction of the inner shaft and has a center hole extending in the axial direction. Based on the position of the center hole, it is rotated about the central axis of the inner shaft.

  According to the embodiment, since the inner shaft is rotated based on the center hole extending in the axial direction and having an axial length, the shaft serving as a reference for the rotation of the inner shaft is defined as the inner shaft. It is easy to make it coincide with the central axis. Therefore, it is possible to further suppress rotational runout (center misalignment) of the sensor-equipped rolling bearing device.

  According to the method of manufacturing a rolling bearing device with a sensor of the present invention, after the axial end of the inner peripheral surface of the target member is press-fitted into the axial end of the outer peripheral surface of the inner ring, the outer peripheral surface of the target member is Since the effect of press-fitting the target member into the inner ring does not reach the size of the target member of the sensor-equipped rolling bearing device after manufacture, the target member is precisely positioned at a predetermined position. Can be positioned. Further, after the one end portion of the target member is press-fitted into the one end portion of the outer peripheral surface of the inner ring, the target member is rotated in the state where the inner shaft is rotated about the central axis of the inner shaft. Since the outer peripheral surface of the bearing is machined, the rotational runout of the rolling bearing device with sensor can be removed, and the position of the rolling bearing device with sensor and the moment load applied to the rolling bearing device with sensor are large. The thickness can be measured accurately.

  Further, according to the present invention, the outer peripheral surface of the target member is processed after the outer ring and the inner ring are sealed with the sealing device, so that the one end of the outer peripheral surface of the inner ring is processed. Even if the outer peripheral surface of the target member is processed after the one end portion of the target member is press-fitted into the part, the wear powder of the target member generated by the processing (including polishing) is generated by rolling elements and tracks. Without reaching the surface, the rolling elements and the raceway surface can be reliably protected from the abrasion powder.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an axial cross-sectional view of a sensor-equipped rolling bearing device manufactured by a method for manufacturing a sensor-equipped rolling bearing device according to an embodiment of the present invention.

  This sensor-equipped rolling bearing device is a hub unit. This sensor-equipped rolling bearing device includes an inner shaft 1, an inner ring 2, an outer ring 3, a plurality of first balls 4 as first rolling elements, a plurality of second balls 5 as second rolling elements, and a case member. 6. A shield plate 7 as a sealing device and a displacement sensor device 10 are provided.

  The inner shaft 1 has a small-diameter shaft portion 19, a medium-diameter shaft portion 20 as a first shaft portion, and a large-diameter shaft portion 21 as a second shaft portion. A screw is formed on the outer peripheral surface of the small diameter shaft portion 19. The medium-diameter shaft portion 20 is connected to the small-diameter shaft portion 19 via the step portion 18 and has an outer diameter larger than the outer diameter of the small-diameter shaft portion 19. The large-diameter shaft portion 21 is located on the opposite side of the medium-diameter shaft portion 20 from the small-diameter shaft portion 19 side. The large-diameter shaft portion 21 is connected to the medium-diameter shaft portion 20 via a step portion 22 and has an outer diameter larger than the outer diameter of the medium-diameter shaft portion 20. The outer peripheral surface of the large-diameter shaft portion 21 has an angular type raceway groove 23 as an outer peripheral raceway surface, and the outer diameter of the raceway groove 23 increases as the distance from the medium-diameter shaft portion 20 increases.

  The inner shaft 1 has a first center hole 30 and a second center hole 31. The first center hole 30 is formed in the central portion in the radial direction of the end surface on the small-diameter shaft portion 19 side in the axial direction of the inner shaft 1, while the second center hole 31 is formed in the axial direction of the inner shaft 1. It is formed at the central portion in the radial direction of the end surface on the large-diameter shaft portion 21 side. The first center hole 30 has a substantially hemispherical shape, while the second center hole 31 has a cylindrical portion and extends a predetermined distance in the axial direction. The inner shaft 1 has a wheel mounting flange 50 for mounting a wheel (not shown) at an end portion on the large-diameter shaft portion 21 side in the axial direction.

  The inner ring 2 is fitted and fixed to the outer peripheral surface of the medium-diameter shaft portion 20 of the inner shaft 1. The end surface of the inner ring 2 on the large diameter shaft portion 21 side in the axial direction is in contact with the stepped portion 22. The inner ring 2 has an angular raceway groove 28 as an outer raceway surface on the outer diameter side of the large-diameter shaft portion 21. The outer diameter of the raceway groove 28 increases as the distance from the large diameter shaft portion 22 increases. The outer peripheral surface of the inner ring 2 has a cylindrical outer peripheral surface 26 on the side opposite to the large-diameter shaft portion 21 side in the axial direction. The cylindrical outer peripheral surface 26 is different from the large-diameter shaft portion 21 side of the raceway groove 28. The track shoulder 29 located on the opposite side is connected via a step 30. The track shoulder 29 has a cylindrical outer peripheral surface. The outer diameter of the cylindrical outer peripheral surface 26 is smaller than the outer diameter of the cylindrical outer peripheral surface of the track shoulder 29.

  The end surface of the inner ring 2 on the large diameter shaft portion 21 side in the axial direction is in contact with the step portion 22. As shown in FIG. 1, the nut 63 is screwed into the screw of the small diameter shaft portion 19. The end surface of the inner ring 2 opposite to the large-diameter shaft portion 21 in the axial direction is in contact with the end surface of the nut 63 on the large-diameter shaft portion 21 side in the axial direction. The inner ring 2 is securely fixed to the inner shaft 1 by screwing the nut 63 into the large-diameter shaft portion 21 side in the axial direction for a predetermined distance.

  The outer ring 3 is located outward in the radial direction of the large-diameter shaft portion 21. The inner peripheral surface of the outer ring 3 has an angular first track groove 44 as a first inner track surface and an angular second track groove 45 as a second inner track surface. Yes. The plurality of first balls 4 are spaced apart from each other in the circumferential direction while being held by the first cage 40 between the raceway groove 28 of the inner ring 2 and the first raceway groove 44 of the outer ring 3. The plurality of second balls 5 are held by the second cage 41 between the raceway groove 23 of the inner shaft 1 and the second raceway groove 45 of the outer ring 3, They are arranged at intervals in the circumferential direction.

  The case member 6 includes a cylindrical member 52 and a disk-shaped lid member 53. An end of the inner peripheral surface of the cylindrical member 52 on the outer ring 3 side is fixed to an end of the outer peripheral surface of the outer ring 3 on the small diameter shaft portion 19 side by a set screw 55. On the other hand, the lid member 53 closes the opening of the cylindrical member 52 on the side opposite to the outer ring 3 side. In this way, foreign matter is prevented from entering the inside of the sensor-equipped rolling bearing device.

  The shield plate 7 has a labyrinth seal that seals between the axial end of the inner peripheral surface of the outer ring 3 on the first track groove 44 side and the cylindrical outer peripheral surface of the track shoulder 29 of the inner ring 2. . Specifically, the shield plate 7 has a substantially L-shaped cross section, and has an axially extending portion and a radially extending portion. The axially extending portion has a cylindrical shape and extends in the axial direction. On the other hand, the radially extending portion extends radially inward from one end of the axially extending portion. The cylindrical outer peripheral surface of the axially extending portion is fitted and fixed to the end of the inner peripheral surface of the outer ring 3 on the small diameter shaft portion 19 side. On the other hand, the radially extending portion faces the cylindrical outer peripheral surface of the track shoulder 29 in the radial direction via a slight gap.

  The displacement sensor device 10 includes a sensor main body 60 and a target member 61. The sensor body 60 is fixed to the inner peripheral surface of the cylindrical member 52. On the other hand, the target member 61 has a cylindrical shape. One end of the target member 61 in the axial direction is pressed into the cylindrical outer peripheral surface 26 of the inner ring 2 by press-fitting. In other words, the one end portion of the target member 61 is externally fitted and fixed to the cylindrical outer peripheral surface 26 as one end portion of the outer peripheral surface of the inner ring 2.

  FIG. 2 is an enlarged cross-sectional view of the periphery of the displacement sensor device 10 in FIG.

  As shown in FIG. 2, the sensor main body 60 includes a first sensor member 70 and a second sensor member 71. Each of the first and second sensor members 70 and 71 is fixed to the inner peripheral surface of the cylindrical member 52. The first sensor member 70 is located closer to the lid member 53 in the axial direction than the second sensor 71. The first sensor 70 is disposed at an interval in the axial direction with respect to the second sensor 71.

  The first sensor member 70 has a sensor ring 83 and four displacement sensors 84, while the second sensor member 71 has a sensor ring 93 and four displacement sensors 94. As shown in FIG. 1, the sensor ring 83 and the sensor ring 93 are fixed to the flange portion 57 of the cylindrical member 52 with a set screw 59 with an annular spacer 58 interposed.

  Although not shown, a plurality of the four displacement sensors 84 are arranged at predetermined intervals in the circumferential direction on the radially inner side of the sensor ring 83 (in this embodiment, at regular intervals in the circumferential direction). On the other hand, a plurality of four displacement sensors 94 are arranged at predetermined intervals in the circumferential direction in the radially inner portion of the sensor ring 93 (in this embodiment, in the circumferential direction). Arranged at regular intervals).

  FIG. 3 is a diagram illustrating the arrangement configuration of the four displacement sensors 94 in the circumferential direction. Although not described, the four displacement sensors 84 also have the same circumferential arrangement as the four displacement sensors 94. Moreover, in FIG. 3, the reference number 70 has shown the flange of the outer ring | wheel 3 shown by 70 in FIG.

  As shown in FIG. 3, each displacement sensor 94 includes a coil element 100 a and a coil element 100 b that are arranged close to each other in the circumferential direction to form a pair. The four displacement sensors 94 are radially opposed to the portion located most vertically above the target member 61 with the sensor-equipped rolling bearing device (in this embodiment, the hub unit) installed at a predetermined position. The position, the position facing the portion of the target member 61 that is positioned at the lowest position in the radial direction, the position facing the radial direction, and the position of the target member 61 facing the frontmost side of the vehicle on which this rolling bearing device with a sensor is attached The position and the target member 61 are installed at positions that are radially opposed to a position on the most rear side of the vehicle to which the rolling bearing device with a sensor is attached. The four displacement sensors 84 overlap the four displacement sensors 94 substantially in the axial direction.

  In each group, each of the coil element 100a and the coil element 100b making a pair has an independent detection surface, and the coil element 100a and the coil element 100b making a pair are connected in series. The sensor ring 93 has a pair of magnetic poles 93a and 93b protruding inward in the radial direction at an end portion on the inner side in the radial direction. The coil element 100a has a coil wound around the magnetic pole 93a, while the coil element 100b has a coil wound around the magnetic pole 93b. In each of the magnetic pole 93 a and the magnetic pole 93 b, the radially inner end face 28 is a detection surface, and this detection surface is opposed to the outer peripheral surface of the target member 61 in the radial direction with a gap. Yes.

  FIG. 4 is a diagram illustrating an example of a gap detection circuit connected to the sensor main body 60.

  As shown in FIG. 4, each of the two sets of coil elements 100 a and coil elements 100 b positioned in the vertical direction is connected to an oscillator 130. An alternating current having a constant period is supplied from the oscillator 130 to the two sets of the coil element 100a and the coil element 100b. A synchronization capacitor 131 is connected in parallel to the two sets of coil elements 100a and 100b.

  Then, the output voltages (detected values) of the one coil element 100a and the coil element 100b and the other coil element 100a and the coil element 100b are input to the differential amplifier 132, and the output voltage corresponding to the direction of the same straight line. By setting (detected value), temperature drift is removed. Although not shown, the other two sets of coil element 100a and coil element 100b positioned in the front-rear direction are also removed from the temperature drift by taking the difference with the differential amplifier in the same manner as described above.

  In each of the displacement sensors 84 and 94, the inductance of the coil element 100a (or coil element 100b) is L, the area of the detection surface is A, the magnetic permeability is μ, the number of turns of the coil is N, and the target member 61 from the detection surface. If the interval (gap) is d, the following equation (a) is established.

L = A × μ × N ² / d (a)
When the gap d to the target member 61 changes, the inductance L of the displacement sensor 24 changes and the output voltage changes. Therefore, the radial gap from the detection surface of the displacement sensor 24 to the target unit 4 can be detected by detecting the fluctuation of the output voltage.

  Each of the displacement sensors 84 and 94 has an independent detection surface for the target member 61 and has a structure in which a pair of coil elements 100a and 100b are connected in series. In addition, compared with the case where one coil element 200 constitutes one displacement sensor, the generated magnetic flux density can be increased. Therefore, the detection sensitivity of the gap with the target member 61 can be increased.

  Referring to FIG. 2 again, the outer peripheral surface of the target member 61 has a first annular groove 134 and a second annular groove 135. A part of the first annular groove 134 is present at a position facing the detection surface of the displacement sensor 84 in the radial direction, while a part of the second annular groove 135 is radially formed on the detection surface of the displacement sensor 94. It exists in the opposite position.

  FIG. 6 is a diagram illustrating the positional relationship between the detection surface A1 of the displacement sensor 84, the detection surface A2 of the displacement sensor 94, the first annular groove 134, and the second annular groove 135.

  As shown in FIG. 6, in the axial direction, the center portion of the detection surface A1 substantially coincides with the edge of the first annular groove 134 on the second annular groove 135 side, while the center portion of the detection surface A2 is The two annular grooves 135 substantially coincide with the edge on the first annular groove 134 side.

  Assuming that the target member 61 is displaced by a distance δ from the state toward the lid member 53 in the axial direction, the wrap length in the axial direction between the detection surface A1 and the first annular groove 134 (the length overlapping in the axial direction). Decreases, the wrap length in the axial direction between the detection surface A2 and the second annular groove 135 (the overlapping length in the axial direction) increases. From this, the detected value of the gap of the displacement sensor 84 decreases, while the detected value of the gap of the displacement sensor 94 increases. As described above, when the target member 61 is displaced in the axial direction, a difference occurs between the detection value detected by the displacement sensor 84 and the detection value detected by the displacement sensor 94.

  When the target member 61 moves in the axial direction, the first annular groove 134 and the second annular portion 135 change the detected values detected by the displacement sensor 84 and the displacement sensor 94 in the positive and negative directions. Axial position is set. Therefore, by taking the difference between the detection value of the displacement sensor 84 and the detection value of the displacement sensor 94, the axial translation amount of the inner ring 2 (inner shaft 1) (the axial displacement, the axial translation load) Can be detected).

  Since the displacement sensor 84 and the displacement sensor 94 are disposed adjacent to each other in the axial direction, the displacement sensor device 10 is detected by four sets of two displacement sensors 84 and 94 that overlap in the axial direction in the axial section. The inclination of the target member 61 with respect to the surfaces A1 and A2 can be detected. Although the calculation is not described in detail, the displacement sensor device 10 is not limited to the calculation of the translational load in the vertical direction of the wheel, the translational load in the axial direction of the wheel, and the translational load in the longitudinal direction of the wheel. Based on the inclination, moment loads acting on the sensor-equipped rolling bearing device (specifically, a moment load around the wheel in the vertical direction and a moment load around the wheel in the front-rear direction) are detected.

  In this embodiment, the center portion of the detection surface A1 on the lid member 53 side substantially coincides with the edge of the first annular groove 134 on the second annular groove 135 side, while the center portion of the detection surface A2 is The second annular groove 135 substantially coincides with the edge on the first annular groove 134 side. However, in the axial direction, a part of the detection surface A1 of the displacement sensor on the lid member side overlaps with a part of the first annular groove on the lid member side, and a part of the detection surface A2 of the displacement sensor on the rolling element side As long as it overlaps with a part of the second annular groove on the rolling element side, the same effect as that of the above embodiment can be obtained.

  FIG. 7 is a diagram illustrating a state in which the rolling bearing device with a sensor illustrated in FIG. 1 is being assembled.

  Hereinafter, a method for manufacturing a rolling bearing device with a sensor according to an embodiment of the present invention will be mainly described with reference to FIG.

  First, the inner ring 2 is fitted and fixed to the medium-diameter shaft portion 20 of the inner shaft 1 by press fitting. Next, the first ball 4, the second ball 5, and the outer ring 5 are assembled to the inner shaft assembly formed by fitting the inner ring 2 to the inner shaft 1.

  Next, the nut 63 is screwed onto the screw of the small-diameter shaft portion 19 of the inner shaft 1, and the inner ring 2 is fastened to the large-diameter shaft portion 21 side in the axial direction by the nut 63, so The preload between the first raceway groove 44 and the first raceway groove 44 is set to a predetermined preload, and the preload between the raceway groove 23 of the inner shaft 1 and the second raceway groove 45 of the outer ring is set to a predetermined preload.

  Subsequently, as shown in FIG. 7, the one end portion of the target member 61 is externally fitted and fixed to the cylindrical outer peripheral surface 26 of the inner ring 2 by press-fitting. Thereafter, the shield plate indicated by 7 in FIG. 1 is fitted and fixed to the end portion of the inner peripheral surface of the outer ring 3 on the small diameter shaft portion 19 side by press fitting, and the axial direction of the inner peripheral surface of the outer ring 3 is fixed. A labyrinth seal is formed between the end portion on the small-diameter shaft portion 19 side and the cylindrical outer peripheral surface of the track shoulder portion 29 of the inner ring 2.

  Thereafter, the wheel mounting flange 50 of the inner shaft 1 is grasped by a chuck device (not shown), and torque is applied to the inner shaft 1 using this chuck device, so that the inner shaft 1 is inserted into the second center hole 31. Rotate around the central axis of the second center hole 31 with respect to the central axis. Then, with the inner shaft 1 rotating around the central axis, the outer peripheral surface of the target member 61 is cut, and the first annular groove 134 and the second annular portion 135 are formed on the outer peripheral surface of the target member 61. After roughly forming, the outer peripheral surface of the target member 61 is precisely polished into a predetermined shape.

  Finally, after fixing the sensor main body 60 to the case member 6, the cylindrical member 52 of the case member 6 in which the sensor main body 60 is integrated is fixed to the outer peripheral surface of the outer ring 3 with a set screw 55 (see FIG. 1). The rolling bearing device with sensor is formed.

  According to the manufacturing method of the rolling bearing with sensor of the above embodiment, one end portion in the axial direction of the inner peripheral surface of the cylindrical target member 61 is press-fitted into the outer peripheral cylindrical surface 26 which is one end portion of the outer peripheral surface of the inner ring 2. Since the outer peripheral surface of the target member 61 is processed later, the influence of press-fitting the target member 61 into the inner ring 2 may reach the dimensions of the target member 61 of the sensor-equipped rolling bearing device after manufacture. Without, the outer peripheral surface of the target member 61 can be precisely positioned at a predetermined position.

  That is, by pressing one end portion in the axial direction of the target member 61 into the inner peripheral cylindrical surface 26 that is one end portion in the axial direction of the outer peripheral surface of the inner ring 2, the inner portion of the target member 61 is large and axially positioned. Even if non-uniform distortion occurs, processing is performed in a state where the target member 61 is distorted. Therefore, an outer peripheral surface caused by distortion caused by press-fitting, which has conventionally occurred when press-fitting is performed after processing. No deterioration of positioning accuracy occurs. In addition, when press-fitting is performed after processing, the accuracy of positioning of the outer peripheral surface of the target member is deteriorated due to the accuracy of the outer peripheral surface position of the inner ring. Since the member is processed, the accuracy of positioning of the outer peripheral surface of the target member due to the accuracy of the outer peripheral surface position of the inner ring does not occur.

  Moreover, according to the manufacturing method of the rolling bearing with a sensor of the said embodiment, the outer periphery cylinder which is an end part of the outer peripheral surface of the inner ring | wheel 2 in the state which rotated the inner shaft 1 around the central axis of the inner shaft 1. Since the outer peripheral surface of the target member 61 press-fitted into the surface 26 is processed, the outer peripheral surface of the target member 61 is compared with the case where the outer peripheral surface of the target member is processed without rotating the inner shaft. At the time of processing, the rotational shake of the rolling bearing device with sensor can be efficiently removed, and the rotational shake of the rolling bearing device with sensor after manufacture can be suppressed.

  Therefore, for the above two reasons, the axial and radial displacements of the sensor-equipped rolling bearing device and the magnitude of the moment load applied to the sensor-equipped rolling bearing device can be accurately measured.

  Moreover, according to the manufacturing method of the rolling bearing with a sensor of the said embodiment, since the outer peripheral surface of the target member 61 is processed after sealing between the outer ring | wheel 3 and the inner ring | wheel 2 with the shield board 7, The wear powder of the target member 61 generated by processing (including polishing) does not reach the first and second balls 3, 4 and the raceway grooves 23, 28, 44, 45, and the The first and second balls 3 and 4 and the raceways 23, 28, 44 and 45 can be reliably protected.

  Moreover, according to the manufacturing method of the rolling bearing with a sensor of the said embodiment, when processing the target member 61, based on the 2nd center hole 31 extended in the said axial direction and having the length of an axial direction, Since the rotation of the shaft 1 is performed, it becomes easy to make the rotation center line that is the reference for the rotation of the inner shaft 1 more accurately coincide with the central axis of the inner shaft 1. Therefore, it is possible to further suppress rotational runout (center misalignment) of the sensor-equipped rolling bearing device.

  Moreover, according to the manufacturing method of the rolling bearing with a sensor of the said embodiment, since the said sensor main body 60, ie, the 1st sensor member 70, and the 2nd sensor member 71 are previously fixed to the case member 6, it is with a sensor. When assembling the rolling bearing device, the sensor body 60 can be fixed to the rolling bearing device with the sensor simply by fixing the case member 6 to the outer peripheral surface of the outer ring 1 as described above. Therefore, it is not necessary to attach the sensor main body 60 to the outer ring 3 individually, and it is not necessary to provide the outer ring 3 with a mounting structure such as a through hole for mounting the sensor. Moreover, since the relative position of the sensor main body 60 with respect to the case member 6 is determined in advance, the positioning of the sensor main body 60 with respect to the target member 61 can be performed accurately and easily.

  In the manufacturing method of the rolling bearing with sensor according to the above embodiment, after the target member 61 is press-fitted into the inner ring 2, the opening on the target member 61 side in the axial direction between the inner ring 2 and the outer ring 3 is sealed with the shield plate 6. However, in the present invention, the target member 61 may be press-fitted into the outer peripheral surface of the inner ring 2 after the axial opening between the inner ring 2 and the outer ring 3 on the target member 61 side is sealed with a sealing device.

  Moreover, in the manufacturing method of the rolling bearing with a sensor of the said embodiment, centering of the inner shaft 1 was performed when rotating the inner shaft 1 using the 2nd center hole 31 of the inner shaft 2, but in this invention The inner shaft may be centered when the inner shaft is rotated based on a portion of the inner shaft other than the second center hole of the inner shaft, such as an axial end face of the inner shaft.

  Moreover, in the manufacturing method of the rolling bearing with a sensor of the said embodiment, although the rolling element of the rolling bearing with a sensor manufactured was a ball, in this invention, the rolling element of the rolling bearing with a sensor manufactured is a roller. Needless to say, it may be included and may contain rollers and balls.

It is sectional drawing of the axial direction of the rolling bearing apparatus with a sensor manufactured with the manufacturing method of the rolling bearing apparatus with a sensor of one Embodiment of this invention. It is an expanded sectional view of the periphery of the displacement sensor in FIG. It is a figure explaining the arrangement configuration of the peripheral direction of a displacement sensor. It is a figure which shows an example of the gap detection circuit connected to the sensor main body. It is a figure which illustrates typically that the magnetic flux density which occurs with a displacement sensor becomes large. It is a figure which shows the positional relationship of the detection surface of the displacement sensor of a 1st sensor member, the detection surface of a displacement sensor of a 2nd sensor member, a 1st annular groove, and a 2nd annular groove. It is a figure which shows the state in the middle of assembling the rolling bearing apparatus with a sensor shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner shaft 2 Inner ring 3 Outer ring 4 1st ball 5 2nd ball 7 Shield plate 10 Displacement sensor device 20 Medium diameter shaft portion 21 Large diameter shaft portion 22 Step portion 23 Track groove 28 Track groove 44 First track groove 45 First 2 track grooves 60 sensor body 61 target member

Claims (2)

A first shaft portion and a second shaft portion that is continuous with the first shaft portion via a step portion, has an outer diameter larger than the outer diameter of the first shaft portion, and has an outer circumferential raceway surface. An inner shaft having
An inner ring that fits to the first shaft portion of the inner shaft and has an outer circumferential raceway surface on the outer circumferential surface;
An outer ring having a first inner circumferential raceway surface and a second inner circumferential raceway surface;
A first rolling element disposed between the first inner raceway surface and the outer raceway surface of the inner ring;
A second rolling element disposed between the second inner raceway surface and the outer raceway surface of the inner shaft;
A sealing device for sealing between the outer ring and the inner ring;
In the axial direction of the inner ring, only one end part in the axial direction of the inner peripheral surface is provided at one end part of the outer peripheral surface of the inner ring that is located on the opposite side of the sealing device from the first rolling element side. A displacement sensor device having an annularly fitted target member and a sensor main body facing the target member in the radial direction of the target member, and detecting the axial and radial displacements of the target member A rolling bearing device with a sensor for manufacturing a rolling bearing device with a sensor comprising:
A first rolling element is disposed between the first inner raceway surface and the outer raceway surface of the inner ring, the second inner raceway surface, and the outer raceway surface of the inner shaft. A second rolling element between
Then, the space between the outer ring and the inner ring is sealed with the sealing device,
The one end of the target member is press-fitted into the one end of the outer peripheral surface of the inner ring,
The one end portion of the target member is press-fitted into the one end portion of the outer peripheral surface of the inner ring, and the inner shaft is moved in a state where the space between the outer ring and the inner ring is sealed by the sealing device. A method of manufacturing a sensor-equipped rolling bearing device, wherein the outer peripheral surface of the target member is processed after being rotated about the central axis of the inner shaft. In the manufacturing method of the rolling bearing device with a sensor according to claim 1,
The inner shaft has a center hole that opens in the center of the end surface on one side in the axial direction of the inner shaft and extends in the axial direction,
A method of manufacturing a sensor-equipped rolling bearing device, wherein the inner shaft is rotated about the center axis of the inner shaft based on the position of the center hole.

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