JP2012053002A - Bearing with rotation sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent disconnection of a wire even when a bearing with a rotation sensor is fit to a position where an orbit wheel to which a sensor holder is attached may generate creep.SOLUTION: An axial-direction one-end part 15 including a protrusion 18 of an annular sensor holder 5 is engaged with one orbit wheel 2 engaged with a fixing member 9 by using a peripheral groove 7 such as a seal groove to fit the axial-direction one-end part 15 slidably in a direction around an axis, and in the fit state, the sensor holder 5 and the fixing member 9 are connected to a fixing tool 19, so that the sensor holder 5 slides against the orbit wheel 2 in accordance with creep generated on the orbit wheel 2 but is prevented from being rotated against the fixing member 9.

Description

  This invention relates to the bearing with a rotation sensor provided with the rolling bearing and the magnetic rotation sensor.

  Typical examples of this type of bearing with a rotation sensor include those used for motor shaft, rotation speed control, rotation direction control, rotation angle control, etc. of an automobile axle. In a bearing with a rotation sensor, one bearing ring that constitutes a rolling bearing is a stationary bearing ring that is fitted to a fixed member such as a motor housing or an automobile suspension, and the other bearing ring is fixed to the fixed member. Thus, the rotating side ring is attached to a rotating side member that rotates about the axis.

  One of the bearing rings, which is a stationary-side bearing ring, is used as a base for supporting the sensor holder because it is convenient for wiring and sensor positioning. The sensor holder has an annular shape so as to have a mounting structure that uses fitting on one of the race rings. By making this fitting into press-fitting, the sensor holder is fixed to one of the race rings while holding the magnetic sensor. The encoder that rotates integrally with the other race ring converts the rotational motion into a change in magnetic field. The encoder can be easily inserted into the raceway peripheral surface of the other raceway through a metal core, or by using a rotation side member, the other raceway, a nut, etc. It is fixed.

  As described above, the rolling bearing is incorporated between the fixed member and the rotating member, the sensor holder is attached to one of the race rings, and the signal from the magnetic sensor is connected to the external device side by the wiring extending from the sensor holder to the outside. Can be detected by an encoder and a magnetic sensor (for example, Patent Document 1).

JP2002-40037

  Regardless of whether the inner ring or the outer ring is a stationary ring, if it is attached by fitting to a fixed member, creep may occur in the stationary ring due to shaft unbalance. In such a case, it is conceivable to press-fit the stationary side race ring into the fixed member.

  However, in the case where press-fitting cannot be employed due to a problem in assembling the bearing, if creep occurs, there is a possibility that the wiring coming out from the sensor holder is cut.

  Accordingly, an object of the present invention is to prevent the wiring from being cut even when a bearing with a rotation sensor is incorporated at a location where a raceway ring to which a sensor holder is attached generates creep.

  In order to achieve the above object, in short, the present invention is such that the sensor holder is slidably attached to one of the inner and outer races in the direction around the axis. If there is a risk of creep on one of the races in the detection state, if the sensor holder is prevented from rotating around the axis in advance, the sensor holder will move against one of the races when creep occurs. The wiring is prevented from being cut because it slides and does not rotate about the axis with respect to the fixed member.

  Specifically, a fixing tool for connecting a sensor holder to the fixing member to which the one bearing ring is fitted is provided, and the sensor holder connected by the fixing tool has a fitting surface between the fixing member and one of the bearing rings. The above-mentioned slip can be generated according to the relative rotation generated between the two. In the case where the bearing with the rotation sensor is incorporated at a location where the bearing ring to which the sensor holder is attached generates creep, the above-described detent can be easily performed using the provided fixing tool.

  The sensor holder is formed in either an endless annular shape or an endless annular shape as long as the sensor holder can be positioned in the radial direction and the axial direction with respect to the one raceway without any trouble in detection and slipping in a state where the sensor holder is connected Alternatively, either an attachment structure that fits directly into one of the race rings or an attachment structure that fits into another member fixed to one of the race rings may be employed.

  For example, a circumferential groove extending in the direction around the axis is formed in the one of the race rings, and the sensor holder is formed in an end ring that is divided at one place in the direction around the axis, and the axial direction of the sensor holder A mounting structure in which a convex portion that can be inserted into the circumferential groove is formed at one end portion by elastically changing the gap between both end portions of the annular end in the axial direction. Since both ends of the end ring can be elastically changed in the direction around the axis, the radial dimension of one end of the sensor holder in the axial direction can be changed so that the fitting with one of the race rings is loosened. It becomes easy to fit and insert the convex part into the circumferential groove. Since only the sensor holder is elastically changed, one end of the sensor holder in the axial direction including the convex portion follows one of the races after the elastic recovery. Therefore, the sensor holder can be positioned in the radial direction and the axial direction at one end in the axial direction until the sensor holder is connected to the fixing member by the fixing tool. Since the convex portion enters the circumferential groove extending in the direction around the axis, the above-described slip can be allowed no matter how much creep occurs on one of the raceways.

  For example, the sensor holder can be connected to the fixing member at both sides of the sensor holder by the fixing tool so that the distance between the end portions of the end ring is fixed. Then, it is possible to prevent the end portions of both ends of the ring from being inadvertently approached by utilizing the connection by the fixing tool, and to prevent the sensor holder from falling off.

  When a pair of seal grooves is formed on the raceway side peripheral surface as the one raceway, the peripheral groove for the convex portion is additionally machined by using the one seal groove as the circumferential groove. There is no hassle.

  As another example, a guide member fixed to the track-side peripheral surface of the one raceway is provided, and the sensor holder has a sliding surface that abuts the guide member in the axial direction and fits around the axis. It is also possible to employ a mounting structure that is made of an endless annular body and is connected to the fixing member by the fixing tool, and is attached to one of the race rings via a guide member. Since the sensor holder and the guide member abut against each other in the axial direction and fit around the axis, the sensor holder is supported on one of the races via the guide member, and the axial direction and the radial direction are connected by connecting the fixture. It is possible to keep the state of being positioned in the position. The guide member allows the above-mentioned slipping when it is difficult to slip when the sensor holder is directly fitted into the race, or the magnetic gap between the magnetic sensor and the encoder can be set to a predetermined value due to the shape of the sensor holder. is there. If the guide member is fixed to one of the race rings by press fitting, a circumferential groove is unnecessary.

  Furthermore, if a holder stopper fixed to the raceway side peripheral surface of the one raceway is provided and the sensor holder attached to the one raceway abuts against the holder stopper in the axial direction, the guide member can be fixed. Positioning in the axial direction is facilitated, and the inclination of the sensor holder with respect to the axial direction can be prevented at the abutting portion with the holder stopper.

  While adopting the guide member, the sensor holder can be attached without fixing the holder stopper to one of the races.

  For example, a holder stopper is attached to the one raceway so as to be rotatable around an axis, the guide member is press-fitted into the one raceway, and the holder stopper and the sensor holder are fixed. If the sensor holder is rotatably attached to one of the bearing rings, the sensor holder can be unitized with one of the bearing rings even before the sensor holder is connected to the fixing member.

  As the fixing tool, for example, a screw member that fastens the connecting member of the sensor holder protruding from the one raceway and the fixing member in the axial direction can be employed. Since the sensor holder has a connecting portion, it can be connected to the fixing member only by screwing.

  As another fixture, the fixing member and the sensor holder can be connected via an engaging member extending in the radial direction, and the engaging member protrudes from the one raceway to the outside. A holder having a peripheral portion that supports the other axial end portion of the holder in the radial direction and a side surface portion that supports the other axial end portion in the axial direction can be employed. By connecting the engaging member to the fixed member, the sensor holder can be positioned in the axial direction and the radial direction with respect to one of the races, and the other end side of the sensor holder in the axial direction may swing during detection. This can be prevented with a joint member. The engagement member and the fixing member may be connected by an appropriate means such as screwing.

  It is preferable that the engaging member has a concavo-convex portion that engages with a concavo-convex portion formed at the other axial end portion of the sensor holder in the direction around the axis. Compared with the case where the rotation prevention by the interference between the peripheral portion and the sensor holder is employed, the rotation prevention between the sensor holder and the engagement member can be further enhanced when the slip occurs.

  As described above, according to the present invention, since the sensor holder is slidably attached to one of the inner and outer races in the direction around the axis, the race to which the sensor holder is attached generates creep. Even when a bearing with a rotation sensor is incorporated at a location, cutting of the wiring can be prevented.

Sectional drawing of the II line | wire of FIG. 2 of 1st Embodiment Front view of the first embodiment (A) is sectional drawing of the II-II line of 2nd Embodiment, (b) is a front view of said (a). Exploded perspective view of the second embodiment Sectional drawing which shows a mode that it connects with the engaging member of 3rd Embodiment in the same cutting location as FIG. Sectional drawing which shows the state connected with the engaging member of 3rd Embodiment in the same cutting location as FIG. The exploded perspective view of the sensor holder of a 3rd embodiment (A) is sectional drawing which shows the principal part of 4th Embodiment by the same cutting location as FIG. 3 (a), (b) is a front view of said (a). The exploded perspective view of the sensor holder of a 4th embodiment (A) is sectional drawing which shows the principal part of 5th Embodiment by the same cutting location as FIG. 3 (a), (b) is a front view of said (a).

1st Embodiment of this invention is described based on FIG. 1, FIG.
As shown in FIGS. 1 and 2, the bearing with a rotation sensor according to the first embodiment includes a rolling bearing 3 having an inner ring 1 and an outer ring 2, and an annular sensor holder 5 that holds a magnetic sensor 4.

  This bearing with a rotation sensor is assembled into a unit in which the rolling bearing 3 is a non-separable type, the sensor holder 5 is attached to one of the race rings 2 of the inner and outer rings 1 and 2, and the encoder 6 is attached to the other race ring 1. Yes.

  One raceway ring 2 has a circumferential groove 7 extending in the direction around the axis. The circumferential groove 7 is composed of a seal groove for the seal 8 formed as a pair on the raceway side circumferential surface of one raceway ring 2. The rolling bearing 3 is a deep groove ball bearing with a single seal.

  One track ring 2 is attached to the fixing member 9 by fitting. The other race ring 1 is fixed to a rotating member 10 that rotates with respect to a fixed member 9. The rolling bearing 3 incorporated between the fixed member 9 and the rotating member 10 and the rotating member 10 have a predetermined coaxiality. The direction around the axis can be said to be the direction around the center axis of the rolling bearing 3. In the present invention, the “axial direction” refers to the direction along the bearing central axis of the rolling bearing 3, and the “radial direction” refers to the direction orthogonal to the bearing central axis.

  The magnetic sensor 4 and the encoder 6 are those of a known magnetic rotation sensor. Here, the “rotation sensor” refers to a sensor that can output at least one detection signal of a rotation angle, a rotation speed, and a rotation direction as an electrical signal. As the encoder 6, a rubber magnet having an endless annular shape, in which N poles and S poles are alternately arranged in the direction around the axis, is employed. The encoder 6 is attached to the raceway side peripheral surface of the other raceway ring 1 via a cored bar 11. The magnetic sensor 4 is composed of an element that converts a magnetic field change caused by the rotation of the encoder 6 into an electric signal.

  The sensor holder 5 is formed in an end-like annular shape that is divided at one place around the axis. The sensor holder 5 is formed into one part by injection molding in order to reduce the number of parts. The sensor holder 5 has a side wall 12 facing the encoder 6 from one axial direction, and the sensor holder 5 and the encoder 6 form a labyrinth seal. The sensor holder 5 holds the circuit board 14 on which the integrated circuit including the magnetic sensor 4 and the connector 13 are mounted at a predetermined position. The circuit board 14 is held by resin sealing. When the sensor holder 5 is attached to one of the race rings 2, the encoder holder 6 attached to the other race ring 1 is positioned in a radial direction. The magnetic sensor 4 or the like is not limited to the surface mounted on the circuit board 14, and the wiring and each element can be individually soldered directly to the circuit board.

  The sensor holder 5 has an axial end 15 that fits directly into one of the race rings 2. A convex portion 18 that can be inserted into one circumferential groove 7 is formed at one end 15 in the axial direction by elastically moving the end portions 16 and 17 away from each other by utilizing a gap between the end portions 16 and 17 having an annular shape. Has been. A peripheral surface portion other than the convex portion 18 at the one axial end 15 has a cylindrical surface shape that fits into the raceway ring 2. The convex portion 18 is continuous between both end portions 16 and 17 in the direction around the axis.

  The gap between both ends 16 and 17 is elastically changed in the direction around the axis so that both ends 16 and 17 of the sensor holder 5 approach each other in the direction around the axis. After inserting the convex portion 18 into the circumferential groove 7 by inserting from one side in the direction, the sensor holder 5 is elastically recovered, so that the axial one end 15 including the convex portion 18 is elastic and the circumferential groove 7 of the bearing ring 2 is elastic. Since it is along the track-side peripheral surface including the inside, the sensor holder 5 is fitted into the track-side peripheral surface of one of the track rings 2. In this state, the sensor holder 5 is positioned in the radial direction and the axial direction at the axial end portion 15, so that the bearing ring 2 can be integrated with the rolling bearing 3 with a coupling strength that can be incorporated between the fixed member 9 and the rotating member 10. It is attached to.

  Since the sensor holder 5 attached as described above and the one raceway ring 2 are in contact with each other on the surface continuous in the direction around the axis, the sensor holder 5 is slidable with respect to the raceway ring 2. . Since the sensor holder 5 is made of resin, there is no fear that the sensor holder 5 adheres to the surface of the raceway ring 2, and slipperiness can be provided even if an interference is provided along the axial end portion 15.

  The sensor holder 5 can be injection-molded using a polyamide-imide resin as a main material in order to prevent the axial end portion 15 of the sensor holder 5 from being deformed by temperature creep. As the polyamideimide resin, for example, product series name: AI polymer MS manufactured by Mitsubishi Gas Chemical Co., Ltd. can be used.

  This bearing with a rotation sensor includes a fixture 19 for connecting the sensor holder 5 to a fixing member 9 to which one of the race rings 2 is fitted. The fixing tool 19 includes a screw member that fastens the connecting member 20 of the sensor holder 5 protruding outward from the raceway ring 2 and the fixing member 9 in the axial direction. There may be at least one screw member. When the fixture 19 and the connecting portion 20 are used, screw holes are formed on the side surface of the fixing member 9 in an arrangement corresponding to the connecting portion 20.

  Both sides of the sensor holder 5 with the dividing point as a boundary can be connected to the fixing member 9 by fixtures 19 and 19, respectively. The connection only needs to be screwed in these two places. By these connections, the distance between the end portions 16 and 17 of the sensor holder 5 in the direction around the axis is fixed. Therefore, even if the above-mentioned slip occurs, the slip resistance normally does not act in the direction of approaching the ends 16 and 17 in the direction around the axis, but acts in the direction of moving away, so there is no fear that the sensor holder 5 falls off. . If the distance between the end portions 16 and 17 in the direction around the axis is fixed by the fixing tool 19, the sensor holder 5 can be further prevented from falling off, and even when one of the race rings is used as the inner ring 1, the falling off is further prevented. be able to.

  In the state where the sensor holder 5 is attached to one of the race rings 2 and the rolling bearing 3 is incorporated between the fixed member 9 and the rotating member 10 as described above, the wiring 21 is connected to the connector 13, and the sensor holder 5 The magnetic sensor 4 is connected to the external device (not shown) side by the wiring 21 extending from the outside to the outside. The wiring 21 is collected into one cable. In this connected state, detection by the encoder 6 and the magnetic sensor 4 that rotate together with the other race ring 1 can be performed. Input / output for detection is transmitted / received via the wiring 21.

  The sensor holder 5 connected to the fixing member 9 by the fixing tool 19 causes the above-mentioned slip by the resistance of the fixing tool 19 when relative rotation (creep) occurs between the fitting surfaces of the fixing member 9 and one of the race rings 2. Occurs and does not rotate relative to the fixed member 9. For this reason, cutting of the wiring 21 is prevented.

  A second embodiment will be described with reference to FIGS. The bearing with a rotation sensor according to the second embodiment is common to the first embodiment in that an annular sensor holder is attached using a circumferential groove of a rolling bearing and is connected to a fixing member with a fixture. Hereinafter, the differences from the first embodiment will be mainly described, and the description of the same conceivable configuration will be omitted.

  As shown in the figure, the fixture 30 can be connected between the fixing member 9 and the sensor holder 31 via an engaging member 32 extending in the radial direction. The fixing tool 30 includes an engaging member 32 and a screw member 33 that fastens the engaging member 32 to the fixing member 9.

  The sensor holder 31 has an axial other end 34 projecting outward from one raceway ring 2, and an uneven portion 35 having a step in the axial direction on the axially outer side surface of the axial other end 34. Is added.

  The engaging member 32 has a peripheral portion 36 that extends in the direction around the axis, and a side surface portion 37 that protrudes in the radial direction from one axial end portion of the peripheral portion 36.

  The peripheral portion 36 is adapted to be fitted to the other axial end portion 34 of the sensor holder 31 attached to one of the race rings 2. The engaging member 32 is formed with a notch 38 for allowing the connector 13 to pass therethrough (to connect the wiring) during the fitting. The side surface portion 37 has a concavo-convex portion 39 that engages with the concavo-convex portion 35 of the fitted axial other end portion 34 in the axial direction on the side surface on the axially inner side. The concave and convex portions 35 and 39 are engaged with each other on both sides with the gap as a boundary in order to fix the gap between the both end portions 16 and 17 which are the above-mentioned dividing points.

  The engaging member 32 has a flange portion 40 that can be fastened to the fixing member 9 by the screw member 33 in a state of being fitted to the other axial end portion 34. When the sensor holder 31 is connected to the fixing member 9 by this screwing, the peripheral portion 36 supports the other axial end portion 34 in the radial direction, and the side surface portion 37 supports the other axial end portion 34 from the one axial end side. Supporting toward the other end side, the concave and convex portions 35 and 39 are engaged, and the sensor holder 31 is prevented from rotating by the engaging member 32. Therefore, when creep occurs in the race 2, the sensor holder 31 slips due to the resistance of the fixture 30. Further, the vibration of the other end 34 in the axial direction is prevented by the peripheral portion 36. Further, the sensor holder 31 is prevented from falling off at the side surface portion 37.

  A third embodiment will be described with reference to FIGS. The bearing with a rotation sensor according to the third embodiment attaches a ring-shaped sensor holder using a circumferential groove of a rolling bearing, and is a fixing member using a fixture such as an engaging member having a peripheral part, a side part, and an uneven part. It is common to 2nd Embodiment by the point connected to. Hereinafter, differences from the second embodiment will be mainly described, and description of the same conceivable configuration will be omitted.

  As shown in the drawing, the bearing with a rotation sensor according to the third embodiment has a separation type rolling bearing 41. The rolling bearing 41 is a tapered roller bearing. One raceway ring 42 does not have a seal groove, and a circumferential groove 45 is added to insert the convex portion 44 of the sensor holder 43. Since the concavo-convex portion 46 of the sensor holder 43 is also configured by using the projecting portion 47 for holding the circuit board, the number of detents by the engaging member 48 is increased as compared with the second embodiment, and the detent performance is improved. Can be increased. The encoder 49 is a rubber magnet that is directly fitted on the raceway side peripheral surface of the other raceway ring without a cored bar.

  A fourth embodiment will be described with reference to FIGS. The bearing with a rotation sensor according to the fourth embodiment is the first in that it has one bearing ring without a seal groove, and is connected to the fixing member by a fixing tool such as an engaging member having a peripheral portion, a side surface portion, and an uneven portion. Common to the third embodiment. Hereinafter, differences from the third embodiment will be mainly described, and description of the same conceivable configuration will be omitted.

  As illustrated, the bearing with a rotation sensor according to the fourth embodiment includes a guide member 51 and a holder stopper 52 that are fixed to the raceway side peripheral surface of one raceway ring 50. The sensor holder 53 is made of an endless annular body. The sensor holder 53 has a sliding surface 54 that abuts and fits with the guide member 51 in the axial direction.

  First, the holder stopper 52 is fixed by press-fitting the holder stopper 52 into one of the race rings 50. Next, the guide member 51 is fixed by press-fitting the guide member 51 into one of the race rings 50 until it abuts against the holder stopper 52 in the axial direction. Next, the sensor holder 53 is attached to the track ring 50 via the guide member 51 by causing the sensor holder 53 to abut against the holder stopper 52 in the axial direction and fitting until the sliding surface 54 abuts against the guide member 51 in the axial direction. It is done. When the sensor holder 53 attached to the raceway ring 50 is connected to a fixing member (not shown) in this way, the sensor holder 53 is prevented from falling off. The connection may be either screwing only or a combination of engaging members.

  Since the guide member 51 and the holder stopper 52 are each fixed by press-fitting a cylindrical fitting surface, it is not necessary to add a circumferential groove to the race ring 50.

  Since the guide member 51 can be press-fitted against the holder stopper 52, positioning in the axial direction when the guide member 51 is fixed is facilitated, and the inclination of the sensor holder 53 with respect to the axial direction at the location where the holder stopper 52 abuts. Can be prevented. When the axial contact range of the sensor holder 53 with respect to the guide member 51 is sufficient for the attachment, the holder stopper 52 can be omitted.

  The guide member 51, the holder stopper 52, and the sensor holder 53 can each be formed of a metal material for press-fitting. The surface of the guide member 51 that is in contact with the sliding surface 54 of the sensor holder 53 is more slippery than the surface of the raceway ring 50. The guide member 51 can be incorporated as a bush that supports the sensor holder 53. The holder stopper 52 can also be used as a wall surface for inserting and positioning the circuit board in the sensor holder 53 from the axial direction.

  The means for slidably attaching the sensor holder by using a separate member for the raceway having no circumferential groove such as a seal groove may be in other modes. As an example, the fifth embodiment will be described with reference to FIG. Since the fifth embodiment is a modified example from the fourth embodiment, the differences are mainly described and the same names are used for common components.

  As illustrated, the bearing with the rotation sensor according to the fifth embodiment is different in that the holder stopper 62 is rotatably attached to one of the race rings 60. After the guide member 61 is press-fitted into the track ring 60, the sensor holder 63 is attached to the track ring 60 by fitting the sliding surface 64 of the sensor holder 63 to the guide member 61 from the axial direction. Further, the holder stopper 62 is attached to the race ring 60 from the direction opposite to the sensor holder 63. When the holder stopper 62 and the sensor holder 63 are fixed, the sensor holder 63 is rotatably attached to the raceway ring 60.

  Specifically, the fixed sensor holder 63 and holder stopper 62 are positioned in the axial direction with respect to the bearing ring 60 by the guide member 61 sandwiched from both sides in the axial direction, and are also positioned in the radial direction with respect to the bearing ring 60. Is done. As described above, the fifth embodiment is such that the sensor holder 63 is rotatably unitized into the raceway ring 60 having no peripheral groove such as a seal groove even before the sensor holder 63 is connected to the fixing member. It is superior to the fourth embodiment.

  The holder stopper 62 and the sensor holder 63 are fixed by fastening by screwing the screw member 65 into the sensor holder 63. This fixing may be performed by a connection in which a claw portion or a claw hole portion appropriately formed on the holder stopper 62 or the sensor holder 63 is engaged. Since the raceway ring 60 is a separated type, the unitization of the guide member 61, the holder stopper 62, and the sensor holder 63 can be performed in an appropriate wide working space. When applying to the non-separable type, it is possible to unitize by first attaching the holder stopper 62, then press-fitting the guide member 61, attaching the holder stopper 63, and screwing the screw member into the holder stopper 62 from the outside. is there. If one raceway 60 is separated, it is not necessary to attach the holder stopper 62 first. Further, if the screw member 65 is screwed into the sensor holder 63, the shape of the uneven portion for the engaging member, for example, the formation of a counterbore hole for the screw member or the formation of the uneven portion that avoids the screw member is used. Is not limited to the placement of.

  The technical scope of the present invention is not limited to the above-described embodiment, but includes all modifications within the scope of the technical idea based on the description of the scope of claims. For example, even when the inner ring is one track ring and the fixing member is a shaft-like member fitted to the inner ring, an attachment structure such as an end ring-shaped sensor holder, an engaging member, and a guide member can be employed. Also, when the outer ring is one raceway and the bearing with a rotation sensor is installed between one end of the rotating member in the axial direction and the fixed member, the engaging member does not require a shaft through hole. A lid-like engaging member that covers from the outside can prevent foreign matter from entering the gap in the bearing with the rotation sensor. In addition, when the sensor holder is coupled to the fixing member with one end of the wiring connected to the magnetic sensor side, the wiring may be troublesome for fitting the engaging member. Only need to be connected.

1 Inner ring (the other race ring)
2, 42, 50, 60 Outer ring (one raceway ring)
3, 41 Rolling bearing 4 Magnetic sensor 5, 31, 43, 53, 63 Sensor holder 6, 49 Encoder 7, 45 Circumferential groove 8 Seal 9 Fixing member 10 Rotating member 13 Connector 15 Axial end portion 16, 17 End portion 18, 44 Protrusions 19 and 30 Fixing tool 20 Connecting part 21 Wiring 32 and 48 Engagement members 33 and 65 Screw member 34 Other axial end parts 35, 39 and 46 Concavity and convexity part 36 Peripheral part 37 Side face part 40 Gutter part 47 Projection part 51 61 Guide members 52, 62 Holder stoppers 54, 64 Sliding surfaces

Claims (11)

A rolling bearing having an inner ring and an outer ring, and an annular sensor holder for holding a magnetic sensor;
The sensor holder can be attached to the raceway by fitting the sensor holder to one side of the inner and outer rings,
The rolling bearing is incorporated between the fixed member and the rotating member, the sensor holder is attached to the one bearing ring, and the signal from the magnetic sensor is transmitted to the external device by the wiring extending out from the sensor holder. In a bearing with a rotation sensor that performs detection by an encoder that rotates integrally with the other of the inner and outer rings and the magnetic sensor in a state of being input to the side,
The bearing with a rotation sensor, wherein the sensor holder is slidably attached to the one raceway in a direction around an axis. A fixing tool for connecting the sensor holder to the fixing member to which the one raceway ring is fitted;
2. The bearing with a rotation sensor according to claim 1, wherein the sensor holder connected by the fixture generates the slip in response to a relative rotation generated between the fitting surfaces of the fixing member and the one raceway ring. A circumferential groove extending in the direction around the axis is formed in the one raceway ring,
The sensor holder is formed in an end ring that is divided at one place around the axis,
The convex part which can be inserted in the said circumferential groove is formed in the axial direction one end part of the said sensor holder by elastically changing the clearance gap between both ends of a ring-shaped end to the axial direction. Bearing with rotation sensor.   The both sides of the sensor holder with the dividing portion as a boundary can be connected to the fixing member by the fixing tool, respectively, and the interval between both ends of the end ring is fixed by these connections. The bearing with a rotation sensor as described.   The bearing with a rotation sensor according to claim 3 or 4, wherein the circumferential groove includes one of a pair of seal grooves formed on a raceway side circumferential surface of the one raceway ring. A guide member fixed to the raceway side peripheral surface of the one raceway ring,
The sensor holder is composed of an endless annular body having a sliding surface that strikes the guide member in the axial direction and fits around the axis.
The bearing with a rotation sensor according to claim 2, wherein the sensor holder attached to the one bearing ring is connected to the fixing member by the fixing member via the guide member. A holder stopper fixed to the raceway side peripheral surface of the one raceway,
The bearing with a rotation sensor according to claim 6, wherein a sensor holder attached to the one raceway abuts against the holder stopper in an axial direction.   A holder stopper is attached to the one raceway so as to be rotatable about an axis, the guide member is press-fitted into the one raceway, and the holder stopper and the sensor holder are fixed, so that the sensor holder The bearing with a rotation sensor according to claim 6, which is rotatably attached to the raceway ring.   9. The device according to claim 2, wherein the fixture includes a screw member that axially connects the connecting portion of the sensor holder protruding outward from the one raceway and the fixing member. Bearing with rotation sensor. The fixture is connectable via an engagement member extending in the radial direction between the fixing member and the sensor holder.
The engaging member includes a peripheral portion that radially supports the other axial end portion of the sensor holder protruding outward from the one raceway, and a side surface portion that axially supports the other axial end portion. The bearing with a rotation sensor according to claim 2, wherein the bearing has a rotation sensor.   The bearing with a rotation sensor according to claim 9, wherein the engaging member has a concavo-convex portion that engages with a concavo-convex portion formed at the other axial end portion of the sensor holder in a direction around the axis.

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