JPH0923624A - Axle generator for railway vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] The cost is reduced by the bulky structure that supports the stator on the rotor side. [Constitution] A plurality of permanent magnets attached to the axle 20
A rotor portion 21 in which 31 is disposed, a stator portion 22 that has a coil 41 that coaxially surrounds the rotor portion and faces a permanent magnet, and has rotation stopped on the trolley side, a rotor portion side and a stator portion side. Roller rolling surfaces formed to face each other with a gap therebetween, a plurality of rollers arranged so that the outer circumferences of the rollers are abutted between the roller rolling surfaces, and each roller. And a roller support body 55 that supports at a predetermined interval. The roller rolling surfaces on the rotor side and the stator side are the radial roller rolling surfaces 38 and 50 and the thrust roller rolling surface 3
9 and 51, the roller is a radial roller 23,
It is composed of thrust rollers 24. The gap between the rolling surfaces of the radial and thrust rollers is an annular shape that shares a space with each other, and the radial rollers and the thrust rollers are arranged alternately in the circumferential direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle generator that generates electric power by utilizing the axle rotating force of a railway vehicle.

[0002]

2. Description of the Related Art A railroad vehicle is provided with an axle generator in order to obtain a control power source or the like required for running the vehicle. A conventional axle generator supports an axle generator via a support on a vehicle frame, belts the pulley attached to the axle and the pulley attached to the axle generator, and drives the generator by rotating the axle. It was supposed to generate electricity. In such an axle generator, foreign matter may get caught between the pulley and the belt while the vehicle is running.As a result, the belt loosens and the torque of the axle is not sufficiently transmitted to the generator. It had the drawback of requiring maintenance. In order to improve such a defect, the applicant of the present invention has disclosed in Japanese Patent Application Laid-Open No. 4-6774.
We have proposed an axle generator for railway vehicles as seen in Japanese Patent Publication No. 8.

As shown in FIG. 5, a schematic structure thereof is as follows. As shown in FIG. 5, an axle 1 of a railroad vehicle is fitted with a rotor member 3 which is dividable at circumferential positions and has permanent magnets 2 arranged at equal intervals on its outer peripheral surface. A stator member 5 is provided outside the rotor member 3, which is dividable in the circumferential direction, and has an inner peripheral surface on which a coil member 4 facing the permanent magnet 2 is disposed. The stator member 5 has a stator with respect to the axle 1. A support member 6 for concentrically positioning the member 5 is attached, and the stator member 5
Is connected to the vehicle via an elastic body. In the figure, 7 is a protective member for preventing the entry of foreign matter. 1 of the support member 6
In the example, the support members 8 are attached to both ends of the stator member 5 in the axial direction, and some guide rollers 9 are supported by shafts 10 via ball bearings. Part of the outer periphery is in contact with the peripheral surface of. In this axle generator, arm rods protruding in the radial direction on the stator member 5 are connected to a bracket provided on the carriage via a link-shaped rod, and the stator member 5 is locked so as not to rotate together with the axle 1. There is. An elastic member is interposed at the connecting portion between the arm rod and the rod to absorb twisting and vibration.

Since the rotor member 3 and the stator member 5 are formed so as to be separable at circumferential positions, even an axle having wheels mounted at both ends can be directly attached to the axle 1 by assembling them so as to surround the axle. You can
Since the rotor member 3 rotates together with the axle without passing through the transmission mechanism, adjustment of the transmission mechanism is unnecessary and maintenance is facilitated. The stator member 5 is positioned concentrically with respect to the axle 1 by the guide roller 9 of the support member 6,
Since a predetermined gap is secured between the rotor member 3 and the rotor member 3, it is possible to generate power without being affected by vibration of the vehicle.

[0005]

In the axle generator described with reference to FIG. 5, the stator member 5 moves together with the axle 1 with respect to the relative movement of the bogie and the axle 1 in the direction perpendicular to the axis. It is rarely affected by the dolly side,
The vibration of the axle 1 is transmitted to the stator member 5 via the guide roller 9, the shaft 10 and the support member 8. Vibration of axle 1 is 20
Since an acceleration of about -30 G acts, the force acting between the axle 1 side and the stator member 5 side is considerably large. That is, the reaction force from the stator member 5 side is
Since the value obtained by multiplying the mass on the side by the acceleration,
Also, the strength of the support member 8 needs to be sufficiently strong against the reaction force from the stator member 5 side. In this case, since the guide roller 9 is cantilevered by the shaft 10 on the side of the stator member 5, it is disadvantageous in strength, and the portion supporting the guide roller 9 becomes large and bulky in order to ensure strength. There is.

In addition, in general, the carriage is axially displaced by about 5 mm with respect to the axle 1. A structure for receiving a thrust load is required between the stator member 5 and the rotor member 3.
Judging from the figure, in the axle generator, the end surface of the guide roller 9 and the end surface of the rotor member 3 come into contact with each other to receive the thrust load. With this structure, the sliding resistance is large. If this is received by the rolling thrust bearing, it is expected that it will become even more bulky. Further, in the generator, it is necessary to match the shaft centers of the rotor and the stator, but in the axle generator, the stator member 5 is supported by the axle 1 via the guide roller 9, the shaft 10 and the support member 8 and supported. Since the member 8 is divided into two parts, it is necessary to ensure that some of the guide rollers 9 are all in contact with the axle 1. Therefore, the accuracy of mounting the guide rollers 9 is extremely high. There is also the problem that it has to adversely affect the cost. SUMMARY OF THE INVENTION It is an object of the present invention to make a support structure for supporting a stator member with respect to a rotor member side, which is not bulky and is cost-effective.

[0007]

Means for Solving the Problems According to the means of the present invention, a rotor portion mounted on an axle and provided with a plurality of permanent magnets on its outer circumference, and a rotor portion coaxially surrounding the rotor portion and facing the permanent magnets. A stator portion having a coil and locked to rotate on the trolley side; and roller rolling surfaces formed on the rotor portion side and the stator portion side, respectively, facing each other with a gap therebetween, and Characterized by comprising a plurality of rollers sandwiched between the roller rolling surfaces of the rollers and arranged so that their outer circumferences come into contact with each other, and a roller support member supporting each of the rollers at a predetermined interval. To do.

In the above means, the roller rolling surface on the rotor side and the roller rolling surface on the stator side are a radial roller rolling surface along the outer peripheral surface of the axle and a thrust roller rolling surface perpendicular to the axle. A radial roller for supporting a radial load arranged between the radial roller rolling surface on the rotor portion side and the radial roller rolling surface on the stator portion side, and the thrust on the rotor portion side. It is preferable that it is composed of a thrust roller that supports a thrust load and that is disposed between the roller rolling surface and the thrust roller rolling surface on the stator side. A gap between the rolling surfaces of the radial roller and a gap between the rolling surfaces of the thrust roller are formed in an annular shape so as to share a space with each other, and the radial roller and the thrust roller are formed in the annular space. It is preferable that they are alternately arranged in the circumferential direction.

It is preferable that the roller support is divided into two parts at a predetermined position in the circumferential direction and is divided into two equal parts, which are connected by a shaft member that is parallel to and removable from the axle to be integrated. It is preferable that the rotor portion and the stator portion are divided into two at predetermined positions in the circumferential direction and are divided into two parts, and the divided parts are connected to each other so as to be detachably mounted on the axle.

According to the above means, the roller is between the roller rolling surface on the rotor portion side and the roller rolling surface on the stator portion side and is in direct contact with both, so that the rotor portion side and the stator portion side are connected. It can support a large load that acts in between without any trouble. Since the roller support simply supports the rollers at a predetermined interval and does not transmit radial load or thrust load, it does not need to be formed large to be particularly strong and requires high accuracy. It is not something to say.

The construction in which both the radial roller and the thrust roller are provided not only supports the radial load between the rotor portion and the stator portion, but also supports the axial movement of the axle in the axial direction with respect to the bogie. When moving, the stator part receives the thrust load from the rotor part through the thrust roller, and the stator part follows without difficulty,
There is no useless rotation resistance, and the axial positional relationship between the permanent magnet and the coil does not change. The configuration in which the radial rollers and the thrust rollers are alternately arranged in the common annular space reduces the required space for arranging the rollers. Generally, the wheels of a railroad vehicle are shrink-fitted to the axle, and in most cases they are not removed until the end of their life. In a shaft generator provided for such an axle, the members surrounding the axle are enclosed. It cannot be removed from the shaft end when assembling or removing and inspecting. On the other hand, the divided roller support body is formed into an annular shape by assembling it using the shaft member, so that it can be easily attached to and detached from a predetermined roller arrangement position. In addition, the rotor portion and the stator portion are 2
Similarly, the divided parts can be easily attached to and detached from the axle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
This will be described with reference to FIG. This axle generator for railway vehicles has axle 20
A rotor portion 21 fixed to the rotor portion 21, a stator portion 22 held by the rotor portion 21, a plurality of rollers 23, 24 provided between the rotor portion 21 and the stator portion 22, and the like. The rotor portion 21 includes a rotor body 30 and eight permanent magnets 31. The rotor main body 30 is composed of main body portions 30a and 30b, which are formed by dividing a tubular body, which has a necessary annular irregularity on the outer periphery and whose inner hole fits the axle 20, into two in the direction along the axis, both of which are shown in FIG. Axle 20 as seen in 1 (a)
8 hexagon socket head cap screws 32, 3 in a tangential direction with respect to
They are joined together by tightening at 3 and are coaxially fixed in place on the axle 20. As shown in FIGS. 1A and 3, eight rod-shaped permanent magnets 31 are arranged at equal intervals on the outer periphery of the intermediate portion of the rotor main body 30 in the axial direction in a state parallel to the axle direction. The arrangement is such that the polarities are alternately reversed. In the figure, 34 is a magnet pressing member, and 35 is a member fixing screw.

As shown in FIG. 1A, a collar-shaped first convex portion 36 is formed on each outer periphery of the rotor main body 30 where the magnets 31 are arranged, on both outer sides in the axle 20 direction. A flange-shaped second convex portion 37 having a large outer diameter with a space on both outer sides.
Is formed. An annular outward groove is formed between the first convex portion 36 and the second convex portion 37, and the groove bottom surface is formed on the roller rolling surface 38, and the groove side surface on the second convex portion 37 side is the roller rolling surface. It is formed on the moving surface 39. First and second convex portions 36, 3
7 is provided with a bolt insertion hole and a screw hole for coupling with the hexagon socket head cap screws 32 and 33.

The stator portion 22 includes a stator body 40 and
It is composed of eight coil portions 41. The stator body 40 is
A stator main body portion 40 is formed into a substantially tubular shape that surrounds the rotor portion 21 and is formed with necessary irregularities on the inner and outer peripheral surfaces thereof, and the tubular body is divided into two in the direction along the axis.
a, 40b, both having connecting edges 42, 43 protruding radially outwardly from the dividing edge, as seen in FIGS. 1 (b), 2, 3 Bonding edge 4
2, 43 are connected to each other by a bolt 44 and a nut 45 to be integrated. Coil portions 41 are arranged at equal intervals on the inner peripheral surface of the stator main body 40 at an axially intermediate position. In the figure,
46 is an iron core and 47 is an iron core fixing screw. On the inner peripheral surface of the stator main body 40, annular first inner surface protrusions 48 are provided on both axially outer sides of the positions where the coil portions 41 are arranged and fixed, and further projecting amounts on both outer sides thereof at intervals. The second inner surface convex portion 49 having a small size is formed. An annular inward groove is formed between the first inner surface protrusion 48 and the second inner surface protrusion 49 at a position facing the outward groove of the rotor body 40, and the groove bottom thereof is a roller rolling member. Formed on the moving surface 50,
The first inner surface convex portion 48 side of the groove side surface is formed as the roller rolling surface 51. Seat portions 53 for fixing the coil terminal boxes 52 are formed on the outer surfaces of the stator main body portions 40a and 40b in a coupled state, and one of them is used depending on the situation. In the figure, reference numeral 54 is a connecting convex portion for connecting to the carriage side in order to restrain the rotation of the stator portion 22.

The rollers 23 and 24 are supported by a roller support 55 to form a roller structure 56, and are surrounded by the roller rolling surfaces 38, 39, 50 and 51, and the permanent magnet 31 and the coil portion 41. Are housed in annular spaces 57 located on both sides of the axle 20 in the axial direction. The roller structure 56 installed in the one annular space 57 will be described. The roller structure 56 is an annular roller support member 5.
5 is adapted to axially support eight rollers 23 and eight rollers 24 alternately at equal intervals along the circumferential direction. The roller support state is as shown in FIGS. 1 (a) and 2, and the roller 23 is a radial load roller that is in contact with the roller rolling surfaces 38 and 50 to support a radial load. It is supported by a support body 55 by a roller shaft 58 parallel to the axis line of. The roller 24 is a thrust load roller that is in contact with the roller rolling surfaces 39 and 51 to support a thrust load, and is supported by a roller support body 55 by a roller shaft 59 in the radial direction of the axle 20.

The roller support body 55 is formed in the same shape by cutting two substantially annular metal plates, which are superposed at intervals in the central axis direction, at two circumferential positions, one of which is shown in FIG. Thus, the roller shafts 58 and 59 are alternately supported at intervals of 30 ° indicated by the angle θ in the circumferential direction. As shown in FIG. 1A and FIG. 2, the roller 23 is supported by the roller support member 55, in which the roller 23 is disposed between the two metal plates 66a and 66b, and the roller shaft 58 is formed of a pin with a head.
Is penetrated through the center of the roller 23 and the two metal plates, and is prevented from coming off by a snap pin 60. The roller 24 is supported by fixing blocks 61 and 62 between metal plates and fixing them with rivets 63.
A shaft hole 64 is formed in the radial direction of the axle 20 in the
Further, the inner end of the roller shaft 59 which supports the roller 24 at the outer end is fitted from the outside in the radial direction, and the spring pin 65 prevents the roller shaft 59 from coming off.

The dividing point is different between the two metal plates, and as shown in FIG.
It is a position on both sides of the radial load roller 23 which is at a position away from each other. The metal plate 66a on the upper side of FIG. 4A is divided at the position where the left end of the drawing exceeds the rivet 63 at the position of the block 62 (see FIG. 4C), and the right end of the drawing is the roller 2
It is divided at a position beyond 3 and the lower metal plate 66b
Is cut at a position where the right end of the drawing exceeds the rivet 63 at the position of the block 62 (see FIGS. 4B and 4D), and is cut at a position where the right end of the drawing passes the roller 23. In the figure, 69 is an insertion hole of the roller shaft 58. Block 62
An auxiliary pin 67 for connection is provided in a protruding manner, and a pin hole 68 into which the pin 67 is fitted is formed at a position beyond the roller 23 of the divided metal plates 66a and 66b. The two semi-circular members shown in FIG. 4 are combined with each other by fitting the pin 67 and the pin hole 68 together to form an annular roller support 55. When the above-mentioned rollers 23 and 24 are assembled to the roller support body 55, a roller structure 56 is formed, the rollers 23 and 23 indicated by phantom lines in FIG. 4A are assembled, and the roller shaft 58 is prevented from coming off. Will be surely integrated.

The axle generator is assembled to the axle 20, and the assembly sequence is as follows. That is, first, the rotor portion 21 is assembled to the predetermined position of the axle 20. This means that the rotor bodies 30a and 30b formed separately are coupled and assembled by bolts 32 and 33 so as to form the rotor body 30 as one body. Next, the roller structure 56 is assembled. This is to assemble the roller support body 55, which is divided into two pieces, so as to be integrated with the rollers 23 and 24 in contact with the roller rolling surfaces 38 and 39 of the rotor portion 21. Then, the stator portion 22 is attached to the outer circumference of the rotor portion 21. This is done so that the stator bodies 40a, 40b formed separately are integrated into the stator body 40, and the roller rolling surfaces 50,
That is, the rollers 23 and 24 are connected and assembled with the bolts 44 and nuts 55 so that the rollers 23 and 24 are in contact with 51. Finally, the connecting convex portion 54 is connected to the truck side via an elastic body, and the stator portion 22 is locked so as not to rotate with respect to the rotor portion 21.

In this state, the stator portion 2 is driven by the running of the vehicle.
The rotor portion 21 rotates with respect to 2, and power is generated. At this time, a relative displacement occurs between the bogie side and the axle 20, but this displacement is absorbed between the coupling convex portion 54 of the stator portion 22 and the bogie, and the stator portion 22 is attached to the rotor portion 21 by the roller 23. , 24, there is no displacement other than relative rotation. That is, the roller 23 is the roller rolling surface 3
8 and 50 to directly support the radial load between the rotor portion 21 and the stator portion 22, and the roller 24 to contact the roller rolling surfaces 39 and 51 to thrust load between the rotor portion 21 and the stator portion 22. This is because the roller support body 55 is configured to directly support the above and not relay the radial load and the thrust load. Therefore, the positional relationship between the rotor portion 21 and the stator portion 22 is always kept constant with respect to the relative movement between the carriage and the axle 20 in the axial direction and the axis-perpendicular direction.
Power generation is always good. Further, even if the rollers 23 and 24 are formed small, the required strength can be obtained, and the roller support 5
No. 5 is required to have strength enough to maintain the positional relationship of the rollers, so that the roller structure 56 can be formed small and the axle generator as a whole can be downsized. Further, the divided structure of the roller support body 55 is such that when the roller support body 55 is integrated, the pin 67 and the pin hole 6
It is an operation that only fits the rollers 8 and 8 and assembles the two rollers 23, and it is not necessary to separately use screw parts and the like, which is advantageous in improving workability and reducing the number of parts.

In the above embodiment, the roller support 55
Describes a roller support structure 56 in which two semi-arcuate members are assembled by fitting a pin 67 and a pin hole 68 into an annular shape, and the roller 23 is assembled by a roller shaft 58 to surely integrate them. However, the configuration is not limited to this. For example, the metal plate 66 in FIGS. 4B and 4C.
a and 66b are divided so that the ends divided at different positions are aligned, that is, one end of the same figure is aligned with the end of the metal plate 66b that does not project from the end of the block 62, and the other end. In the portion, a pin hole that is aligned with the end of the metal plate 66a protruding from the end of the block 62 and is provided instead of the planting hole at the planting position of the pin 67 is used as the through pin instead of the pin 67. Alternatively, the roller support structure divided into two parts by the through pin and the pin hole 68 may be connected.
In this case, it is necessary to prevent the penetrating pin from coming off.

[0021]

According to the invention described in claim 1, since the roller is between the roller rolling surface on the rotor portion side and the roller rolling surface on the stator side and is in direct contact with both, a large load is not a problem. Since the roller support does not transmit both radial load and thrust load, it is not necessary to make it large to be particularly strong, and the roller structure can be downsized, and therefore the axle generator as a whole can be downsized. Play. According to a second aspect of the present invention, the configuration in which both the radial load roller and the thrust load roller are provided receives an axial acting force from the rotor portion that moves axially together with the axle via the thrust load roller. Since the stator portion follows without difficulty, there is no useless rotation resistance, and the axial positional relationship between the permanent magnet and the coil does not change, so that good power generation is always performed. According to the invention described in claim 3, the radial load roller and the thrust load roller are arranged in a common annular space, so that the required space for the roller arrangement is reduced as compared with the case where the rollers are arranged in separate spaces. Therefore, there is an effect that the size can be reduced accordingly. In the invention according to claim 4, since the roller support is divided and formed, it can be easily attached to and detached from a predetermined roller arrangement position,
Maintenance and inspection of the axle generator becomes easy and workability is improved. According to the fifth and sixth aspects of the present invention, since the rotor portion and the stator portion are formed separately, maintenance and inspection of the axle generator is facilitated, and workability is improved.

[Brief description of drawings]

1 shows an embodiment of the present invention, in which (a) is a vertical sectional front view of a main part (a cross-sectional view taken along the line AA of FIG. 3), and (b) is a partial view taken along the arrow B of FIG.

FIG. 2 is a cross-sectional view taken along the line CC of FIG.

FIG. 3 is a cross-sectional view taken along the line DD of FIG.

FIG. 4 shows one of the divided roller supports of the embodiment, (a) is a front view, (b) is a plan view, (c) is a side view, and (d) is D- of (a). It is a D section enlarged view.

FIG. 5 is a vertical sectional front view showing the outline of the configuration of a conventional axle generator.

[Explanation of symbols]

 20 axle 21 rotor part 22 stator part 23 roller (for radial load) 24 roller (for thrust load) 30 rotor body 30a rotor body part 30b rotor body part 31 permanent magnet 38 roller rolling surface 39 roller rolling surface 40 stator body 40a Stator body 40b Stator body 41 Coil 46 Iron core 50 Roller rolling surface 51 Roller rolling surface 55 Roller support 56 Roller structure 57 Annular space 58 Roller shaft 59 Roller shaft 61 Block 62 Block 63 Rivet 66a Metal plate 66b Metal plate

Claims (5)

[Claims] 1. A rotor unit mounted on an axle and having a plurality of permanent magnets arranged on the outer periphery thereof, and a coil surrounding the rotor unit coaxially and facing the permanent magnets. It is sandwiched between the stopped stator portion, the respective roller rolling surfaces formed on the rotor portion side and the stator portion side to face each other with a gap, and between the respective roller rolling surfaces. An axle generator for a railroad vehicle, comprising: a plurality of rollers arranged so that their outer peripheries come into contact with each other; and a roller support body that supports the rollers at predetermined intervals. 2. The railcar axle generator according to claim 1, wherein the roller rolling surfaces on the rotor portion side and the stator portion side are radial roller rolling surfaces along the outer peripheral surface of the axle. And a thrust roller rolling surface perpendicular to the axle, wherein the roller is arranged between the radial roller rolling surface on the rotor portion side and the radial roller rolling surface on the stator portion side. And a thrust roller for supporting a thrust load, which is arranged between the thrust roller rolling surface on the rotor portion side and the thrust roller rolling surface on the stator portion side. Axle generator for railway vehicles. 3. The railcar axle generator according to claim 2, wherein the gap between the radial roller rolling surfaces and the gap between the thrust roller rolling surfaces share a space with each other. And a radial roller and a thrust roller are alternately arranged in a circumferential direction in the annular space. 4. The axle generator for a railway vehicle according to claim 1, claim 2, or claim 3, wherein the roller support body is divided into two equal parts by dividing the roller support body at a predetermined position in the circumferential direction. An axle generator for a railroad vehicle, which is integrally formed by connecting parallel and detachable shaft members. 5. The axle generator for a railway vehicle according to claim 1, claim 2, claim 3 or claim 4, wherein the rotor portion and the stator portion are divided into two at predetermined circumferential positions. An axle generator for a railroad vehicle, which is detachably attached to an axle by combining the respective divided positions.