JP4013606B2 - Pulsar ring - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pulsar ring used in a sensor-equipped rolling bearing unit in which a sensor device including a sensor is integrally attached to a fixed ring side or a rotating ring side of a rolling bearing.
[0002]
The rolling bearing unit with a sensor is used, for example, in a railway vehicle or an automobile to support an axle or a rotating shaft that transmits rotation to the axle and detect the rotational speed of the shaft.
[0003]
[Prior art]
In the rolling bearing unit with sensor for detecting the rotational speed of the shaft, either the sensor device or the pulsar ring is attached to the fixed side, and the other is attached to the rotating side. As such a pulsar ring, a pulsar ring is known which includes a support member including a cylindrical portion and an outward or inward flange portion, and a disk-shaped magnet provided on a side surface of the flange portion of the support member. The magnetized body has N poles and S poles alternately arranged, and the support member is usually a magnetic body such as iron.
[0004]
[Problems to be solved by the invention]
The pulsar ring is in the form of a stacked package during storage and transportation, but when the pulsar ring is stacked, the magnetized body of one pulsar ring and the end of the other pulsar ring attract each other by magnetic force, There was a problem that separation work became difficult.
[0005]
An object of the present invention is to provide a pulsar ring that solves the above-described problems and facilitates the work of removing the pulsar ring from the stacked pulsar rings.
[0006]
[Means for Solving the Problems and Effects of the Invention]
The pulsar ring according to the present invention comprises a cylindrical member and a support member made of a magnetic body formed of a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnetized body provided on the outer surface of the flange portion of the support member. In the pulsar ring, on the other end of the cylindrical portion of the support member, an unevenness is formed to reduce the contact area between the magnetized body of one pulsar ring and the cylindrical end portion of the other pulsar ring at the time of pulsar ring stacking , flange portion of the support member is made of inward part and outward part, the inner diameter of the magnetized member is not more than the inside diameter of the cylindrical portion, Dosoto径is characterized outside diameter or on der Rukoto cylindrical portion Is.
[0007]
The unevenness may be formed, for example, by providing a plurality of notches at the end portion at an equal pitch, or by providing a plurality of protrusions extending in the axial direction at the end portion at an equal pitch. It is also possible to cut out only one part on the periphery of the end part so that the end part has a C-shape, and various shapes can be used as long as the upper pulsar ring does not tilt when pulsar rings are stacked. Is possible. For example, the concavo-convex shape may be corrugated to further reduce the contact area. The width of the notch, the size of the protrusion, the pitch of the notch or protrusion, etc. are set so that the other parts are not affected by wrinkles or the like. Since the unevenness is only provided at the end, and the uneven portion is also made to have a centering function, the press-fitting allowance of the support member is ensured, and the performance after being assembled as a bearing unit is conventionally There is no difference from the ones.
[0008]
According to the pulsar ring of the present invention, when the second pulsar ring is stacked on the first pulsar ring during storage or transportation work, the second pulsar ring is placed on the magnetized flange portion of the first pulsar ring. The end of the support member of the second pulsar ring (the end on which the flange is not provided) is overlapped. At this time, the magnetized body and the end of the support member are in contact with each other or close to each other, and the pulsar rings attract each other by magnetic force. However, since the unevenness is formed on the other end of the cylindrical portion of the support member, The contact area between the magnetic body and the end portion of the cylindrical portion of the other pulsar ring is smaller than that of contact with the entire circumference, and one pulsar ring can be easily taken out from the stacked pulsar rings. Therefore, it is not necessary to use an expensive non-magnetic material such as stainless steel as the pulsar ring.
[0010]
In this case, the magnetized body and the end of the cylindrical portion are always in contact with each other, thereby preventing relative displacement between the pulsar rings during stacking of the pulsar rings, and reliably preventing the collapse of the load. The force with which the magnetized body of the pulsar ring attracts the end of the other pulsar ring is made small by the unevenness, so that one pulsar ring can be easily taken out from the stacked pulsar rings.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows an example of a rolling bearing unit with a sensor in which the pulsar ring according to the first embodiment of the present invention is used. The rolling bearing unit includes an outer ring (4), an inner ring (5), and a rolling bearing (1) including a plurality of balls (6) that are disposed between the outer ring (4) and a sensor provided therein. A device (2) and a pulsar ring (3) as a detected part are provided, a sensor device (2) is provided on the outer ring (4), and a pulsar ring (3) is provided on the inner ring (5).
[0013]
The sensor device (2) includes a support member (11) fixed to the outer ring (4), a rotational speed detection sensor (13) such as a Hall element sensor or a magnetoresistive (MR) element sensor, a processing circuit (not shown), etc. It has.
[0014]
The support member (11) is composed of a short cylindrical outer peripheral wall (11a) and an inner peripheral wall (11b), and a flange (11c) that connects these right ends to each other. Is approximately U-shaped.
[0015]
The pulsar ring (3) of the first embodiment includes a support member (16) made of a magnetic material, which includes a cylindrical portion (16a) and an outward flange portion (16b) provided at the right end portion thereof, and a support member (16). And a magnetized body (17) as a detecting portion provided on the outer surface of the flange portion (16b).
[0016]
The support member (16) of the pulsar ring (3) has a cylindrical portion (16a) arranged on the inner ring (16b) so that the outer surface (right surface) of the flange portion (16b) is substantially flush with the right end surface of the inner ring (5). It is tightly secured to the outer diameter of 5). The end of the cylindrical portion (16a) where the flange portion (16b) is not provided is provided with a plurality of (six in the drawing) notches (18) at equal intervals, thereby forming irregularities. Thus, the area of the end face is made smaller than that in the case where there is no unevenness. The notch (18) is formed so that the uneven end portion has a centering function when fitting into the inner ring (5), so that the pulsar ring (3) can be fitted into the inner ring (5). It is easy to put.
[0017]
A large number of magnetic poles (N poles and S poles) are alternately formed at equal intervals on the magnetized body (17). The sensor device (2) is opposed to the pulsar ring (3) from the outside in the axial direction.
[0018]
In the manufacturing stage, the pulsar ring (3) used in the sensor-equipped rolling bearing unit of FIG. 1 is stored or transported in a stacked state as shown in FIG. In the figure, on the flange portion (16b) with the magnetized body (17) of the first pulsar ring (3A), the end portion of the support member (16) of the second pulsar ring (3B) (the flange portion ( The end of 16b) is not provided. At this time, the magnetized body (17) of the first pulsar ring (3A) and the end of the support member (16) of the second pulsar ring (3B) come into contact with or approach each other. As a result, the pulsar rings (3A) and (3B) are attracted to each other by magnetic force, but an unevenness is formed at the lower end of the cylindrical portion (16a) of the support member (16) of the second pulsar ring (3B). Therefore, the contact area between the lower end of the cylindrical part (16a) of the second pulsar ring (3B) and the magnetized body (17) of the first pulsar ring (3A) is compared to the case where contact is made over the entire circumference. One pulsar ring (3B) can be easily taken out from the stacked pulsar rings (3A) (3B).
[0019]
FIG. 4 shows an example of a rolling bearing unit with a sensor in which the pulsar ring according to the second embodiment of the present invention is used. The rolling bearing unit includes an outer ring (4), an inner ring (5), and a rolling bearing (1) including a plurality of balls (6) that are disposed between the outer ring (4) and a sensor provided therein. A device (2) and a pulsar ring (3) as a detected part are provided, and a pulsar ring (3) is provided on the outer ring (4), and a sensor device (2) is provided on the inner ring (5).
[0020]
The sensor device (2) includes a support member (21) fixed to the inner ring (5), a rotational speed detection sensor (23) such as a Hall element sensor or a magnetoresistive (MR) element sensor, a processing circuit (not shown), etc. It has.
[0021]
The support member (21) is composed of a short cylindrical outer peripheral wall (21a) and an inner peripheral wall (21b), and a flange (21c) that connects these right ends to each other. Is approximately U-shaped. The free end (left end) of the inner peripheral wall (21b) extends to the left of the outer peripheral wall (21a), and the free end of the inner peripheral wall (21b) is closely fitted to the outer diameter of the right end of the inner ring (5). The free end of the outer peripheral wall (21a) is close to the right end surface near the outer diameter of the outer ring (4).
[0022]
The pulsar ring (3) of the second embodiment includes a support member (26) made of a magnetic material comprising a cylindrical portion (26a) and an inward flange portion (26b) provided at the right end portion thereof, and a support member (26). It consists of a magnetized body (27) as a detecting portion provided on the outer surface of the flange portion (26b). The support member (26) has a cylindrical portion (26a) closely fitted to the outer diameter of the outer ring (4) so that the inner surface (left surface) of the flange portion (26b) contacts the right end surface of the outer ring (4). Stopped. A notch (28) similar to that of the first embodiment is provided at the end of the cylindrical portion (26a) where the flange portion (26b) is not provided, so that irregularities are formed. Accordingly, the area of the end face is made smaller than that in the case where there is no unevenness. The notch (28) is formed so that the uneven end portion has a centering function when fitting into the inner ring (5), so that the pulsar ring (3) can be fitted into the inner ring (5). It is easy to put.
[0023]
A large number of magnetic poles (N poles and S poles) are alternately formed at equal intervals on the magnetized body (27). The sensor device (2) is opposed to the pulsar ring (3) from the outside in the axial direction.
[0024]
The pulsar ring (3) used in the sensor-equipped rolling bearing unit of FIG. 4 is stored or transported in a stacked state at the manufacturing stage. Although the illustration of the stacked state is omitted, since the unevenness is formed at the end of the cylindrical portion (26a) of the support member (26) of the pulsar ring (3), the cylinder of the upper pulsar ring (3) at the time of stacking The contact area between the lower end of the part (26a) and the magnetized body (27) of the lower pulsar ring (3) is smaller than that of contact over the entire circumference, and the stacked pulsar rings (3 ) One pulsar ring (3) can be easily taken out.
[0025]
FIG. 5 shows an example of a rolling bearing unit with a sensor in which the pulsar ring according to the third embodiment of the present invention is used. The rolling bearing unit includes an outer ring (4), an inner ring (5), and a rolling bearing (1) including a plurality of balls (6) that are disposed between the outer ring (4) and a sensor provided therein. A device (2) and a pulsar ring (3) as a detected part are provided, a sensor device (2) is provided on the outer ring (4), and a pulsar ring (3) is provided on the inner ring (5).
[0026]
The sensor device (2) includes a support member (71) fixed to the outer ring (4), a power supply unit (72), a rotational speed detection sensor (73) such as a Hall element sensor and a magnetoresistive (MR) element sensor, and a processing A circuit (74) and a transmission unit (not shown) are provided. The power supply unit (72) includes a coil (76), a yoke (77), and a secondary battery (not shown).
[0027]
The support member (71) of the sensor device (2) includes a cylindrical portion (71a) and an inward flange portion (71b) provided at the right end portion thereof, and has an L-shaped annular shape as a whole. An outward projecting portion (71c) that is in contact with the right end surface of the outer ring (4) is provided at an intermediate portion of the cylindrical portion (71a), and from the outward projecting portion (71c) of the cylindrical portion (71a). Also, the left part is closely fitted to the inner diameter of the outer ring (4).
[0028]
The pulsar ring (3) of the third embodiment is a magnetic support member having a T-shaped cross section comprising a cylindrical portion (79a) and inward and outward flange portions (79b) (79c) provided at the right end thereof. (79) and a magnetized body (80) provided on the outer surface of the inward and outward flange portions (79b) and (79c) of the support member (79). The inward flange portion (79b) is formed by folding back the extended portion of the outward flange portion (79c), and the support member (79) is the inner side surface (left side) of the inward flange portion (79b). The cylindrical portion (79a) is tightly fitted to the outer diameter of the inner ring (5) so that is in contact with the right end surface of the inner ring (5). A large number of magnetic poles (N poles and S poles) are alternately formed at equal intervals on the magnetized body (80). The sensor device (2) is opposed to the pulsar ring (3) from the outside in the axial direction.
[0029]
When the sensor device (2) and the pulsar ring (3) rotate relative to each other, an induced current is generated in the coil (76) of the power supply unit (72) of the sensor device (2) along with the change of the magnetic field. By supplying to the transmission unit of the sensor device (2), the primary battery is unnecessary. The pulsar ring (3) has inward and outward flange portions (79b) (79c), and a magnetized body (80) is provided on the outer surface of both flange portions (79b) (79c). Therefore, the area of the magnetized body (80) is larger compared to the case where it is provided only on one of the inward or outward flange portions (79b) (79c). Both functions and functions are more easily demonstrated.
[0030]
Even in the pulsar ring (3) of this embodiment, a plurality of (six in the drawing) notches (81) are provided at the end of the cylindrical portion (79a) where the flange portions (79b) (79c) are not provided. Are provided at equal intervals, thereby forming irregularities, whereby the area of the end face is made smaller than in the case without irregularities. The notch (81) is formed so that the uneven end portion has a centering function when fitting into the inner ring (5), so that the pulsar ring (3) can be fitted to the inner ring (5). It is easy to put.
[0031]
In the manufacturing stage, the pulsar ring (3) used in the sensor-equipped rolling bearing unit of FIG. 5 is stored or transported in a stacked state as shown in FIG. In the figure, the end of the support member (79) of the second pulsar ring (3B) on the flange portion (79b) (79c) with the magnetized body (80) of the first pulsar ring (3A) ( The third pulsar ring (the end that is not provided with the flange) is superimposed on the flange (79b) (79c) with the magnetized body (80) of the second pulsar ring (3B) ( The ends of the support member (79) of 3C) are overlapped. At this time, the magnetized body (80) of the lower pulsar rings (3A) (3B) and the end of the support member (79) of the upper pulsar rings (3B) (3C) come into contact with each other. In this embodiment, even if the center of the lower pulsar ring (3A) (3B) and the center of the upper pulsar ring (3B) (3C) are misaligned, the pulsar ring (3A) (3B ) (3C) attract each other by magnetic force. However, since the upper and lower pulsar rings (3B) (3C) have a concave and convex portion at the lower end of the cylindrical portion (79a) of the support member (79), the upper pulsar ring (3B) (3C) cylindrical portion (79a ) And the lower pulsar ring (3A) (3B) magnetized body (80) is smaller than the contact area over the entire circumference, and the stacked pulsar rings (3A ) (3B) (3C), one pulsar ring (3C) can be easily taken out.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an upper half portion showing an example of a rolling bearing to which a first embodiment of a pulsar ring according to the present invention is applied.
FIG. 2 is a view of the pulsar ring according to the first embodiment when viewed from the axial direction.
FIG. 3 is a longitudinal sectional view showing a state in which the pulsar rings of the first embodiment are stacked.
FIG. 4 is a longitudinal sectional view of an upper half portion showing an example of a rolling bearing to which a second embodiment of the pulsar ring according to the present invention is applied.
FIG. 5 is a longitudinal sectional view of an upper half portion showing an example of a rolling bearing to which a third embodiment of the pulsar ring according to the present invention is applied.
FIG. 6 is a diagram of a pulsar ring according to a third embodiment as viewed from the axial direction.
FIG. 7 is a longitudinal sectional view showing a state in which pulsar rings according to a third embodiment are overlaid.
[Explanation of symbols]
(3) (3A) (3B) (3C) Pulsar ring
(16) Support member
(16a) Cylindrical part
(16b) outward flange
(17) Magnetized body
(18) Notch
(26) Support member
(26a) Cylindrical part
(26b) outward flange
(27) Magnetized body
(28) Notch
(79) Support member
(79a) Cylindrical part
(79b) Inward flange
(79c) outward flange
(80) Magnetized body
(81) Notch

Claims (1)

A pulsar ring comprising a cylindrical member and a magnetic support member made of a flange portion provided at one end of the cylindrical portion, and a disk-shaped magnet provided on the outer surface of the flange portion of the support member. On the other end of the cylindrical part, irregularities are formed to reduce the contact area between the magnetized body of one pulsar ring and the cylindrical part end of the other pulsar ring when the pulsar rings are stacked, and the flange part of the support member is consists inward part and outward part, the inner diameter of the magnetized member is not more than the inside diameter of the cylindrical portion, Dosoto径the pulsar ring, wherein the outer diameter or the der Rukoto of the cylindrical portion.

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