JP4894197B2 - Railway vehicle speed detection rotor - Google Patents

Description

  The present invention relates to a railway vehicle speed detection rotor.

  A railway vehicle is provided with a speed generator as a rotational speed detection device for detecting the rotational speed of the wheels. This speed generator is attached to the axle end and generates electric power having a frequency proportional to the rotational speed of the wheel (axle).

  Speed generators are roughly classified into contact type (pin drive type) and non-contact type. Among these, the contact type speed generator used from the past transmits the rotation of the axle to the speed generator by a drive pin. FIG. 4 is a cross-sectional view showing an example of a railway vehicle bearing device p having a contact-type speed generator 53. As shown in the figure, in the contact-type speed generator, the rotation of the axle 51 is generated via the drive pin 50 attached to the end face of the axle 51 and the rotation transmission member 52 such as a link rod or a disk. Is transmitted to the rotating shaft 54 of the machine 53 (see, for example, Non-Patent Document 1 and Non-Patent Document 2).

  However, in such a contact-type speed generator, there is a problem that the drive pin 50 is worn due to friction with the rotation transmission member 52 or the drive pin 50 is broken. In view of this, a non-contact speed generator using a rotor that rotates together with the axle and a detection member that is in close contact with the rotor is proposed (see Patent Document 1).

Japan National Railways Vehicle Design Office, “Car Common Drawing, Roller Shaft Box 2/3 1968”, February 1968, p. 4-243 Co-authored by Tadao Oyama and Kotaro Hirayama, “Transition of Railway Vehicle Bearings”, Rail and Tech Publishing, March 25, 1997, p. 8 Japanese Patent No. 3000787

A non-contact type speed generator tends to have a lower output than a contact type (pin drive type) speed generator. Therefore, there arises a problem that an external device (signal processing device or the like) for a contact type speed generator cannot be diverted to a non-contact type speed generator.
As a technique for solving this problem, it is conceivable to mount a laminated body of silicon steel plates on the rotor. Silicon steel plates are known to have the characteristics of low loss and high saturation magnetic flux density. Using this silicon steel laminate for the rotor can reduce eddy current loss and increase output. it can. Therefore, by using a silicon steel plate, it is possible to divert an external device (such as a signal processing device) for a contact type speed generator even if it is a non-contact type speed generator.

  However, when a silicon steel plate is used, it is necessary to fix the silicon steel plate to the outer periphery of an annular member (base portion) made of a normal steel material or the like. Therefore, it cannot be made into the integral rotor like the rotor (inductor) of the said patent document 1, and the problem that a silicon steel plate falls off arises.

  In particular, in railway vehicles, there are special circumstances where silicon steel plates are likely to fall off. That is, in the case of a railway vehicle, since the wheels are iron wheels instead of rubber tires, there is a situation that the vibration of the axle becomes extremely intense. In addition, since the rotor of a railway vehicle is larger than a rotor for a passenger car, the silicon steel plate itself or a fixing member (such as a collar ring) for fixing the silicon steel plate is relatively large and heavy. There is also a situation that the inertial force caused by axle vibration becomes large and easily comes off.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a railway vehicle speed detection rotor capable of more securely fixing a silicon steel plate.

The present invention relates to a railway vehicle speed detecting rotor that is attached to an axle and rotates integrally with the axle, and is an annular silicon steel sheet that is laminated in the axial direction and has teeth formed at regular intervals on the outer periphery. A cylindrical portion in which the silicon steel plate is disposed on an outer peripheral surface; a stepped portion that extends radially outward from an axial outer edge of the cylindrical portion to prevent the silicon steel plate from moving outward in the axial direction; and A radial flange portion extending radially inward from an axially inner edge of the cylindrical portion, and an axial direction of the collar ring that is connected to an inner diameter portion of the radial flange portion and constitutes an axially inner portion of the radial flange portion A base portion having an axle side attachment portion that allows mounting from the inside, and an axially inner side of the laminated silicon steel plates and disposed on an outer peripheral surface of the radial flange portion; Prevent axial inward movement It is a railway vehicle velocity detecting rotor, characterized in that and a said flange ring.

  In the rotor of the present invention, the collar ring for preventing the silicon steel plate from moving in the axial direction together with the stepped portion is not on the outer peripheral surface of the cylindrical portion where the silicon steel plate is disposed, but on the outer peripheral surface of the radial flange portion. Has been placed. Since the cylindrical portion is located at the outer edge of the radial flange portion, the inner diameter (hollow diameter) of the cylindrical portion is larger than the inner diameter (hollow diameter) of the radial flange portion. Therefore, the radial flange portion has higher rigidity against the compressive force in the reduced diameter direction than the cylindrical portion. Therefore, by arranging the collar ring on the outer peripheral surface of the radial flange portion, a sufficient grasping force of the collar ring can be ensured even with a small interference. In addition, since the collar ring is arranged on the inner side in the axial direction of the silicon steel sheet, even if the collar ring is removed, the collar ring and the silicon steel sheet only fall on the axle side mounting part side (inner side). There is no scattering. And since the axle side attachment part is allowing | wearing with a collar ring from the axial direction inner side of a rotor, a collar ring can be arrange | positioned at the axial direction inner side of a silicon steel plate.

  According to the railway vehicle speed detection rotor of the present invention, since the arrangement of the collar ring for fixing the silicon steel plate is devised, the silicon steel plate can be fixed more reliably.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view of a railway vehicle bearing device t on which a railway vehicle speed detecting rotor (hereinafter also simply referred to as a rotor) 1 according to an embodiment of the present invention is mounted. FIG. It is sectional drawing of 1 single-piece | unit. This railway vehicle bearing device t includes an axle 2 that rotates integrally with an iron wheel (iron wheel) (not shown), and a double-row tapered roller bearing 3 that rotatably holds the axle 2 with respect to a carriage (not shown). Have. The rotor 1 is mounted coaxially with the axle 2 at the axially outer end of the axle 2. The rotor 1 constitutes a part of a non-contact type speed generator (not shown).

  The railway vehicle speed detecting rotor 1 includes a base 4 made of general-purpose steel, an annular silicon steel plate k that is separate from the base 4, and a silicon steel plate k that is also separate from the base 4. And a collar ring 5 for fixing. The silicon steel plate k is, for example, a thin plate having a thickness of about 0.3 to 0.5 mm. The surface is insulated and a plurality of layers are laminated in the axial direction to form a silicon steel plate laminate ks.

  FIG. 3 is a front view (seen from the outside in the axial direction) of the railway vehicle speed detecting rotor 1 of FIG. As shown in the figure, gear-like teeth k1 are provided on the outer peripheral edge of the silicon steel plate k over the entire circumference at regular intervals in the circumferential direction. All the laminated silicon steel plates k have the same shape having gear-like teeth k1, and the silicon steel plates k are laminated while the positions (phases) of these gear-like teeth k1 are matched. Therefore, the silicon steel sheet laminate ks has a configuration having gear-like teeth. As shown in FIG. 3, the maximum outer diameter of the gear-shaped tooth k1 is slightly larger than the outer diameter of the stepped portion 4d, and the tip of the gear-shaped tooth k1 protrudes radially outward from the stepped portion 4d. ing. By arranging a detection unit (not shown) close to the outside of the gear-shaped tooth k1 in the radial direction via a predetermined gap, power having a frequency proportional to the rotational speed of the axle 2 can be taken out.

  The base body portion 4 is coaxially attached to the axle 2 and is attached to the outer end portion of the axle 2. The small-diameter cylindrical portion 4 a is attached to the outer end portion in the axial direction of the axle 2 and the rotor 1 is attached to the axle 2. A radial flange portion 4b extending radially outward from the axially outer edge of 4a, a cylindrical cylindrical portion 4c extending axially outward from an outer peripheral edge of the radial flange portion 4b, and an axially outer side of the cylindrical portion 4c And a step portion 4d that protrudes radially outward from the edge portion. The step 4d prevents the silicon steel plate k from moving outward in the axial direction. The radial flange portion 4b extends radially inward from the axial inner edge of the cylindrical portion 4c. The small-diameter cylindrical portion 4a constitutes a part of the axle-side attachment portion that constitutes a portion on the axially inner side than the radial flange portion 4b. The base portion 4 is integrally formed as a whole. That is, the base portion 4 is integrally formed as a whole, or is formed integrally by joining the respective portions by welding or the like.

  As shown in FIG. 1, the small-diameter cylindrical portion 4 a of the base portion 4 is externally fitted to the axially outer end portion of the axle 2. The mounting flange 4e, which extends in the radial direction from the axial inner edge of the small diameter cylindrical portion 4a and constitutes the axle side mounting portion together with the small diameter cylindrical portion 4a, is provided with bolt insertion holes h1 in three circumferential directions. The base body portion 4 is fixed to the axle 2 side by a bolt b that is inserted through the insertion hole h1. In order to facilitate the fastening operation of the bolt b to the bolt insertion hole h1, the radial flange portion 4b is provided with a through hole h2 at a circumferential position corresponding to the bolt insertion hole h1.

  The inner diameter of the annular silicon steel plate k is substantially the same as the outer diameter of the cylindrical portion 4c of the base portion 4, and the silicon steel plate k is fitted on the outer peripheral surface of the cylindrical portion 4c. Is attached to the cylindrical portion 4c from the axially inner side (right side in FIG. 2). Due to the presence of the step portion 4d having an outer diameter larger than the inner diameter of the silicon steel plate k, the silicon steel plate k cannot be mounted from the outside in the axial direction (left side in FIG. 2). On the other hand, the base portion 4 is shaped such that the silicon steel plate k can be mounted from the axially inner side (right side in FIG. 2) than the cylindrical portion 4c. That is, the outer diameter of the axle-side attachment portion that is a portion on the inner side in the axial direction than the radial flange portion 4b and that includes the small-diameter cylindrical portion 4a and the attachment flange 4e is smaller than that of the cylindrical portion 4c. Therefore, as described above, the silicon steel plate k can be mounted on the outer peripheral surface 4c1 of the cylindrical portion 4c from the inner side in the axial direction of the base portion 4.

  For the same reason as the silicon steel plate k, the collar ring 5 can also be mounted from the inner side in the axial direction of the base portion 4. The outer diameter of the small-diameter cylindrical portion 4a and the outer diameter of the mounting flange 4e are smaller than those of the cylindrical portion 4c. Therefore, the axle-side attachment portion composed of the small-diameter cylindrical portion 4a and the attachment flange 4e allows the collar 5 to be mounted from the inside in the axial direction. The inner diameter of the collar ring 5 is substantially equal to the outer diameter of the radial flange portion 4b, and the outer diameter of the collar ring 5 is larger than the inner diameter of the silicon steel plate k. The collar ring 5 is disposed not on the outer peripheral surface 4c1 of the cylindrical portion 4c but on the outer peripheral surface 4b1 of the radial flange portion 4b. The outer peripheral surface 4c1 of the cylindrical portion 4c and the outer peripheral surface 4b1 of the radial flange portion 4b have the same diameter, and both the outer peripheral surfaces 4c1 and 4b1 constitute the same circumferential surface. Most of the silicon steel plates k are cylindrical. The remaining silicon steel plate k is disposed on the outer peripheral surface 4b1 of the radial flange portion 4b and is disposed on the outer peripheral surface 4c1 of the portion 4c. Further, the thickness (axial thickness) T1 of the radial flange portion 4b is larger than the thickness (axial thickness) T2 of the collar ring 5, and the collar ring 5 has a radial flange over the entire width. It falls within the axial thickness width of the portion 4b. That is, all of the inner peripheral surface of the collar ring 5 is in contact with the outer peripheral surface 4b1 of the radial flange portion 4b. The collar ring 5 is mounted by shrink fitting.

  The silicon steel sheet laminate ks includes a collar 5 arranged on the axially inner side of the silicon steel sheet laminate ks and on the outer peripheral surface 4b1 of the radial flange portion 4b, and the outer side in the axial direction of the silicon steel sheet laminate ks. It is clamped by the step part 4d arrange | positioned. In order to obtain such an arrangement relationship, the axial width of the cylindrical portion 4c and the axial thickness of the stepped portion 4d and the axial thickness of the silicon steel sheet laminate ks are adjusted. That is, the axial width and the like of the cylindrical portion 4c are designed according to the required thickness of the silicon steel sheet laminate ks.

  When the collar ring 5 for fixing the silicon steel sheet laminate ks is arranged on the outer side in the axial direction of the silicon steel sheet laminate ks, when the collar ring 5 is removed, not only the collar ring 5 but also the silicon steel sheet k The collar 5 and the silicon steel plate k will scatter when moving radially outward and falling off the rotor 1 while the vehicle is running. However, in the railway vehicle speed detecting rotor 1, if the wheel 5 is disengaged, the tangle wheel 5 and the silicon steel plate k do not fall off or scatter. That is, even if the ring 5 is removed from the outer peripheral surface 4b1, the collar ring 5 and the silicon steel plate k only move inward in the axial direction, that is, toward the small diameter cylindrical portion 4a (axle 2 side). As long as the k and collar 5 are maintained in an annular shape (endless shape), they do not fall off the vehicle body. Further, the presence of the step portion 4d integrated with the cylindrical portion 4c prevents the silicon steel plate k from moving out in the axial direction and dropping off.

  The cylindrical portion 4c extends axially outward from the outer peripheral edge of the radial flange portion 4b. The inner diameter (hollow diameter) d1 of the radial flange portion 4b is smaller than the inner diameter (hollow diameter) d2 of the cylindrical portion 4c. As a result, the radial thickness of the radial flange portion 4b is thicker than the radial thickness of the cylindrical portion 4c. Accordingly, the radial flange portion 4b has higher rigidity against the compressive force in the reduced diameter direction than the cylindrical portion 4c. In other words, the radial flange portion 4b is less likely to be reduced in diameter than the cylindrical portion 4c. Therefore, when the collar ring 5 is arranged on the outer circumferential surface 4b1 of the radial flange portion 4b, the grasping force of the collar ring 5 with a small interference can be increased as compared with the case where the collar ring 5 is arranged on the outer circumferential surface 4c1 of the cylindrical portion 4c. it can. Further, since the interference is small, it is easy to attach the collar 5 and the assemblability of the railway vehicle speed detecting rotor 1 is improved.

In the above embodiment, as described above, all of the inner peripheral surface of the collar ring 5 is in contact with the outer peripheral surface 4b1 of the radial flange portion 4b. However, in the present invention, at least one of the inner peripheral surfaces of the collar ring 5 is present. As long as the portion is in contact with the outer peripheral surface 4b1 of the radial flange portion 4b, for example, a part of the inner peripheral surface of the collar ring 5 may be in contact with the outer peripheral surface 4c1 of the cylindrical portion 4c. However, in order to enhance the effect of the gripping force of the collar ring 5 described above, it is preferable that all of the inner circumferential surface of the collar ring 5 is in contact with the outer circumferential surface 4b1 of the radial flange portion 4b.
Moreover, in the said embodiment, although the outer peripheral surface 4b1 of the radial direction flange part 4b and the outer peripheral surface 4c1 of the cylindrical part 4c comprised the same circumferential surface, for example, radial radial flange rather than the outer peripheral surface 4c1 of the cylindrical part 4c The outer peripheral surface 4b1 of the portion 4b has a smaller diameter, there is a step between the outer peripheral surfaces 4c1 and 4b1, the silicon steel sheet laminate ks is disposed on the outer peripheral surface 4c1 of the cylindrical portion 4c, and the inner diameter of the silicon steel plate k A configuration in which the collar ring 5 having a larger outer diameter is disposed on the outer peripheral surface 4b1 of the radial flange portion 4b and the silicon steel sheet laminate ks is sandwiched between the collar ring 5 and the stepped portion 4d.

1 is a cross-sectional view of a railway vehicle bearing device equipped with a railway vehicle speed detection rotor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a railway vehicle speed detection rotor mounted on the railway vehicle bearing device of FIG. 1. FIG. 3 is a front view of the railway vehicle speed detection rotor of FIG. 2. It is sectional drawing of the conventional railway vehicle bearing apparatus which has a drive pin.

Explanation of symbols

1 Railway vehicle speed detection rotor 2 Axle 4a Small diameter cylindrical part (axle side mounting part)
4b radial flange portion 4b1 outer peripheral surface of radial flange portion 4c cylindrical portion 4c1 outer peripheral surface of cylindrical portion 4d stepped portion 4e mounting flange (axle side mounting portion)
5 collar ring

Claims (1)

A railway vehicle speed detecting rotor attached to an axle and rotating integrally with the axle,
An annular silicon steel sheet in which a plurality of sheets are laminated in the axial direction and teeth are formed at regular intervals on the outer periphery;
A cylindrical portion in which the silicon steel plate is disposed on an outer peripheral surface; a stepped portion that extends radially outward from an axial outer edge of the cylindrical portion to prevent the silicon steel plate from moving outward in the axial direction; and the cylinder A radial flange portion extending radially inward from the axially inner edge of the portion, and an inner portion in the axial direction of the collar ring that is connected to an inner diameter portion of the radial flange portion and constitutes an axially inner portion of the radial flange portion An axle-side mounting portion having an outer diameter that allows mounting from the base portion, and
The collar ring disposed on the inner side in the axial direction of the laminated silicon steel sheet and on the outer peripheral surface of the radial flange portion, and preventing movement of the silicon steel sheet in the axial direction;
A rotor for detecting the speed of a railway vehicle, comprising:

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