JPH08116634A - Device for driving rolling stock - Google Patents

Abstract

PURPOSE: To fix permanent magnets without using any screw so that the coming off of the magnets from a cylindrical frame can be prevented by press-fitting fixing members into recessed sections each of which formed between each permanent magnet on the inner peripheral surface of a cylindrical frame, is extended in the axial direction of the frame, and has two or more wedge-like cross sections and grooves each of which is formed at the end section of each permanent magnet on the frame and has a wedge-like cross section. CONSTITUTION: Recessed sections each of which is extended in the axle direction of a railway vehicle and has a wedge-like cross section are formed between rectangular permanent magnets 11a and 11b arranged on and fixed to the internal peripheral surface of a cylindrical frame 10 at prescribed intervals. In addition, grooves each of which is extended in the axle direction of the vehicle and has a wedge-like cross section are formed in the gap sections between the magnets 11a and 11b. Fixing members 14 having shapes matching with those of the recessed sections and grooves are press-fitted into the recessed sections and grooves. Moreover, the angles of retaining slopes 14a and 14b which are formed between the magnets 11a and 11b and the angles of the retaining slopes 10a and 10b of the frame 10 are controlled within the range of 75 deg.-105 deg.. Therefore, the coming off of the magnets 11a and 11b from the frame 10 can be prevented without using any screw even when the frame 10 vibrates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway vehicle drive device driven by an outer rotor type electric motor.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional railway vehicle drive device of this type, and is a partial sectional view showing the relationship between wheels and an outer rotor motor. As shown in the figure, in this wheel-integrated outer rotor electric motor, an axle 3 is supported on a underframe 1 on which a vehicle body is mounted via a shaft spring 2 in a direction orthogonal to the traveling direction of the vehicle. An outer rotor type electric motor stator 4 is fixed to the axle 3.

On the other hand, at least two wheels 7 that can roll on rails 6 laid on the floor are attached to both ends of the axle 3 via a bearing 5. Also,
The body of the axle 3 has a cylindrical shape and is disposed on the outer peripheral side of the stator 4, and one end of which is a bearing ring 8 for bearings.
A frame 10 to which the rotor 9 is attached is rotatably supported by the axle 3 via a frame.

The other end of the frame 10 is attached to the wheel 7 by a screw or the like, and is configured to be rotationally driven by the bearing 8 and the wheel 7 provided on the axle 3.

FIG. 7 shows a sectional view of the rotor 9 of the outer rotor type electric motor mounted on the frame 10. This sectional view shows the BB section shown in FIG. 6, that is, the inside of the rotor 9 mounted on the frame 10. As shown in FIG. 7, a plurality of rectangular permanent magnets 9b are arranged and fixed to the frame 9a on the cylindrical inner peripheral surface side of the frame 10 at predetermined intervals. A pressing member 9c is interposed between the stepped portions formed at the ends of the adjacent permanent magnets 9b, and the pressing member 9c is fixed to the frame 9a with a screw 9d.

[0006]

As described above, since one end of the frame 9a of the conventional rotor 9 is attached to the wheels 7 with screws or the like, it is possible to remove the rails 6 from the rails 6 while the train is running. It receives vibration directly.

Therefore, the screw 9d of the pressing member 9c fixing the end portions of the permanent magnet 9b to each other is loosened, and as a result, the pressing member 9c and the permanent magnet 9b may fall off, and the coil on the side of the stator 4 may be dropped. Could damage the product or cause insulation failure.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a railway vehicle drive device capable of more reliably preventing a permanent magnet or the like from falling off due to vibration.

[0009]

In order to achieve the above-mentioned object, first, a railway vehicle drive device according to a first aspect of the present invention is supported by an axial spring on an underframe on which a vehicle body is mounted, and is moved in a traveling direction. An axle arranged in a direction orthogonal to the axle, at least two wheels rotatably supported at both ends of the axle and rollable on rails laid on the floor, and fixed to the axle. A stator of the outer rotor type electric motor, which is disposed on the outer peripheral side of the stator, has one end rotatably supported by an axle, has a cylindrical body portion, and has the other end portion on the axial side surface of the wheel. In a railway vehicle drive device comprising a frame to be fixed and a rotor of an outer rotor type electric motor consisting of a plurality of rectangular permanent magnets arranged and fixed at a predetermined interval on a cylindrical inner peripheral surface of the frame , On the inner cylindrical surface of the frame And at least two grooves having a wedge-shaped cross section, which are formed in the gaps between the permanent magnets and extend in the axial direction, and the ends of the permanent magnets adjacent to the grooves formed in the frame. A plurality of recesses having a wedge-shaped cross section obtained by forming inclined surfaces extending in the axial direction at the corners facing the stator, and a wedge-shaped groove insertion inserted into the groove of the frame from the axial end. And a plurality of fixing members for integrally fixing the permanent magnets to the frame, which are integrally formed with a pressing portion that presses the concave portion having a wedge-shaped cross section of the permanent magnet.

Further, a railway vehicle drive device according to a second aspect of the present invention is the railway vehicle drive device according to the first aspect, wherein the inclined surface angle of the concave portion having a wedge-shaped cross section of the permanent magnet is 75 degrees. It is characterized in that it is configured in the range of up to 105 degrees.

Further, a railway vehicle drive device according to a third aspect of the present invention includes an axle that is supported by an axial spring on an underframe on which a vehicle body is mounted and that is arranged in a direction orthogonal to the traveling direction. At least two wheels that are rotatably supported on both ends of the axle and can roll on rails laid on the floor;
A stator of the outer rotor type electric motor fixed to the axle and an outer peripheral side of the stator, the one end is rotatably supported by the axle, the body is cylindrical, and the other end is A frame fixed to the side surface in the axial direction of the wheel and a rotor of an outer rotor type electric motor composed of a plurality of rectangular permanent magnets arranged and fixed at a predetermined interval on a cylindrical inner peripheral surface of the frame were provided. In the drive device for railway vehicles,
At least two grooves having a wedge-shaped cross section, which are formed on the inner circumferential surface of the frame of the frame and which are provided between the permanent magnets, and which extend in the axial direction, and the grooves formed on the frame. A plurality of recesses having wedge-shaped cross sections obtained by forming inclined surfaces extending in the axial direction at the corners of the adjacent permanent magnets facing the stator, respectively, and the axial ends of the grooves of the frame. A wedge-shaped groove insertion portion that is inserted from a portion and a pressing portion that integrally presses the concave-shaped concave portion of the permanent magnet is integrally formed,
A plurality of fixing members for fixing each of the permanent magnets to the frame, and a gap between the fixing member and the groove having a cross section of the frame in cross section, each of which inserts a semi-cured prepreg sheet containing resin in glass fiber, The interface between the permanent magnet and the pressing member is integrated by curing the resin.

Further, a railroad vehicle drive device according to a fourth aspect of the present invention is the railroad vehicle drive device according to any one of the first to third aspects, wherein the axial end portion of the fixing member is the same. It is characterized in that pores are provided to allow the cooling air to flow by communicating from the end to the end.

Further, a railroad vehicle drive device according to a fifth aspect of the present invention includes an axle that is supported by an axial spring on an underframe on which a vehicle body is mounted and that is arranged in a direction orthogonal to the traveling direction. At least two wheels that are rotatably supported on both ends of the axle and can roll on rails laid on the floor;
A stator of the outer rotor type electric motor fixed to the axle and an outer peripheral side of the stator, the one end is rotatably supported by the axle, the body is cylindrical, and the other end is A frame fixed to the side surface in the axial direction of the wheel and a rotor of an outer rotor type electric motor composed of a plurality of rectangular permanent magnets arranged and fixed at a predetermined interval on a cylindrical inner peripheral surface of the frame were provided. In the drive device for railway vehicles,
A guide of the plurality of permanent magnets and an inverted triangular protrusion having a role of fixing and mounting the plurality of permanent magnets are provided integrally with the frame and are adjacent to the inverted triangular protrusion formed on the frame. It is characterized in that it is provided with a plurality of recesses having wedge-shaped cross sections obtained by forming inclined surfaces extending in the axial direction at the corners of the permanent magnet facing the stator.

[0014]

Therefore, first, in the railway vehicle drive device according to the first aspect of the present invention, the fixing member is inserted into the groove provided in the frame and the recess having the wedge-shaped cross section provided at the end of the permanent magnet. Since the permanent magnet is fixed to the frame by means of, the permanent magnet can be fixed securely even if the rotor is driven to rotate and vibrates, as compared with the conventional one in which the pressing member is fixed using screws. You can

In the railway vehicle drive device according to the second aspect of the present invention, the permanent magnet can be formed by forming the inclined surface angle of the concave portion having a wedge-shaped cross section in the range of 75 degrees to 105 degrees. Not only can it be fixed more reliably, the shape of the end of the permanent magnet can be simplified, the magnetic flux distribution can be made uniform, and the pressure applied to the fixing member can also be made uniform.

Further, in the railway vehicle drive device according to the third aspect of the present invention, the glass fiber is provided in the gap between the fixing member for fixing each permanent magnet to the frame and the recess having the wedge-shaped cross section formed at the end of the permanent magnet. By inserting a semi-cure prepreg sheet containing resin into the, and curing the resin,
Since the boundary surface between the permanent magnet and the fixing member is integrated, the permanent magnet can be reliably fixed even if vibration occurs due to rotational driving of the rotor.

Further, in the railway vehicle drive device according to the fourth aspect of the present invention, since the cooling air flows into the fixing member through the pores when the rotor rotates, not only the fixing member but also the permanent magnets arranged in the frame generate heat. Can be suppressed.

Further, in the railway vehicle drive device according to the fifth aspect of the present invention, since the permanent magnet can be mounted by using the inverted triangular protrusion formed integrally with the frame as a guide, the work at the time of assembling can be performed. The property is improved, and the permanent magnet can be more securely fixed.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a railway vehicle drive device according to a first embodiment of the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals, and the description thereof will be omitted. Will be described only.

That is, in order to fix the permanent magnets in this embodiment, first, as shown in FIG. 1, a plurality of rectangular shapes are arranged and fixed at a predetermined interval on the inner peripheral surface side of the frame 10. The fixing member 14 is provided in the space between the permanent magnets 11 of the
Is inserted in the direction.

After the fixing member 14 is inserted, the supports 12 and 13 are attached to both ends of the permanent magnet 11. The supports 12 and 13 are attached to the frame 10 by, for example, a spot welding method so as to withstand vibrations from the wheels 7. Also, this support 12,
The height of the frame 13 with respect to the frame 10 takes into consideration the air resistance and the like when the train is running.

FIG. 2 is a sectional view showing the relationship between the permanent magnet 11 and the fixing member 14 at the section AA of FIG. As shown in the figure, a plurality of rectangular permanent magnets 11 are arranged and fixed at a predetermined interval on the inner peripheral surface of the cylinder of the frame 10.
A recess having a wedge-shaped cross section extending in the axle direction is formed between the a and 11b at the corners of the permanent magnets 11a and 11b facing the stator.

Further, a groove having a wedge-shaped cross section extending in the axle direction is formed on the cylindrical inner peripheral surface of the frame 10 at a space between the permanent magnets 11a and 11b. Then, a concave member having a wedge-shaped cross section formed in the gap between the permanent magnets 11a and 11b and a fixing member 14 having a shape that matches the groove having a wedge-shaped cross section formed in the frame 10 are axially inserted. It

The fixing member 14 is used for the frame 10.
A wedge-shaped groove insertion portion that is inserted into the groove from the end in the axial direction and a concave pressure portion having a wedge-shaped cross section of the permanent magnet are integrally formed.

Furthermore, the angle θ between the pressing slopes 14a and 14b forming the recesses having a wedge-shaped cross section formed at the intervals between the permanent magnets 11a and 11b is in the range of 75 ° to 105 °. Correspondingly, frame 1
The angle θ ′ between the pressing slopes 10a and 10b forming the wedge-shaped groove provided at 0 is also in the range of 75 ° to 105 °.

By adopting such a configuration,
Even if the rotor rotates and vibrates, the permanent magnet 11
The a and 11b can be fixed to the frame 10.
In addition, the angle of the inclined surface forming the wedge-shaped cross-section recess formed in the gap between the permanent magnets 11a and 11b is 75 to 1
By configuring in the range of 05 °, the permanent magnet 11
The shapes of the end portions of a and 11b can be simplified, and the magnetic flux distribution can be made uniform.

Further, by adopting such a structure, the mechanical strength of the vehicle outer rotor type electric motor can be improved and the pressure applied to the fixing member 14 can be made uniform.

Next, a railway vehicle drive device according to a second embodiment of the present invention will be described with reference to FIG. Note that FIG.
5, the same parts as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described.

That is, the railway vehicle drive device according to the second embodiment of the present invention, as shown in FIG.
The fixing members 14 are formed in the space between the 1a and 11b and have a wedge-shaped cross section extending in the axial direction and a groove having a wedge-shaped cross section extending in the axial direction formed in the frame 10.
And the wedge-shaped recesses formed at the ends of the permanent magnets 11a and 11b and the gap between the fixing member 14 and the semi-cure prepreg sheet 15 made of glass fiber containing resin.

This semi-cure prepreg sheet 15 is
When pressurized and kept at a high temperature (80 to 120 ° C), the resin contained in the fibers overflows. Then, by curing the resin overflowing from the semi-cured prepreg sheet 15, the permanent magnets 11a and 11b are cured.
And the boundary surface of the fixing member 14 are integrally fixed.

Incidentally, this semi-cure prepreg sheet 1
The adhesive strength of No. 5 is 5 kg / m. It is about m to 20 kg / m · m. Therefore, by adopting such a configuration, even if the rotor is rotationally driven, it is possible to prevent the permanent magnets 11a and 11b from falling off the frame 10 due to vibration.

Next, a railway vehicle drive device according to a third embodiment of the present invention will be described with reference to FIG. That is, as shown in the figure, the railway vehicle drive device according to the third embodiment of the present invention is formed in the frame 10 and the concave portion having the wedge-shaped cross section formed at the end portions of the permanent magnets 11a and 11b. A hole 16 for passing cooling air which is communicated from one end to the other end of the permanent magnets 11a and 11b in the central portion of the fixing member 14 inserted so as to match the groove having a wedge-shaped cross section.
Is provided.

With this structure, cooling air flows through the pores 16 and the permanent magnets 11a,
It is possible to suppress the heat generation of 11b, and as a result, it is possible to reduce the size and weight of the railway vehicle drive device.

Next, a railway vehicle drive device according to a fourth embodiment of the present invention will be described with reference to FIG. That is, as shown in the same drawing, the railway vehicle drive device according to the fourth embodiment of the present invention includes a guide for the permanent magnets 11a and 11b and a permanent magnet 11a in the gap between the permanent magnets 11a and 11b. , 11b are provided integrally with the frame 10 to form projections 17 in the shape of inverted triangles, which have a role of fixing and mounting the frames 11b.

The inverted triangular projection 17 is formed by casting, for example, lost wax. With this configuration, the permanent magnets 11a and 11b can be mounted using the inverted triangular protrusion 17 as a guide, so that the outer rotor type electric motor can be easily assembled.

Further, also by the railway vehicle drive device according to the fourth embodiment, the permanent magnet 1 is generated by the rotational vibration.
It is possible to prevent the 1a and 11b from falling off the frame 10.

[0037]

As described in detail above, according to the railway vehicle drive device of the present invention, by fixing a plurality of permanent magnets without using screws, the permanent magnets fall off the frame due to vibration. It is possible to provide a drive device for a railway vehicle that can prevent such a situation.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a railway vehicle drive device according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a main part inside a rotor in the same embodiment.

FIG. 3 is a cross-sectional view showing a main part inside a rotor according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a main part inside a rotor according to a third embodiment of the present invention.

FIG. 5 is a sectional view showing a main part inside a rotor in a fourth embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing a relationship between wheels and an outer rotor electric motor of a conventional railway vehicle drive device.

FIG. 7 is a sectional view of a rotor of a conventional outer rotor type electric motor.

[Explanation of symbols]

1 ... Underframe, 2 ... Axle spring, 3 ... Axle, 4 ... Stator, 5 ... Bearing, 6 ... Rail, 7 ... Wheel, 8 ... Bearing, 9
... Rotor, 10 ... Frame, 10a, 10b ... Frame holding slope, 11, 11a, 11b ... Permanent magnet, 1
2, 13 ... Supports, 14 ... Fixing members, 14a, 14b ... Permanent magnet pressing slopes, 15 ... Semi-cured prepreg sheets, 16 ... Pores, 17 ... Protrusions.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shunichi Kawaji No. 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu factory

Claims (5)

[Claims] 1. An axle, which is supported by a frame spring on which a vehicle body is mounted, by an axial spring and is arranged in a direction orthogonal to the traveling direction, and is rotatably supported by both ends of the axle, and is attached to a floor surface. At least two wheels that can roll on the laid rail, a stator of the outer rotor type electric motor fixed to the axle, and an outer peripheral side of the stator, and the one end is rotatably supported on the axle. A frame having a cylindrical body portion and the other end portion fixed to the side surface in the axial direction of the wheel, and a plurality of frames arranged and fixed at a predetermined interval on the cylindrical inner peripheral surface of the frame. In a railway vehicle drive device including a rotor of an outer rotor type electric motor composed of rectangular permanent magnets, a cylindrical inner peripheral surface of the frame is formed in a gap portion between the permanent magnets, and a shaft. At least two cross sections extending in the same direction A plurality of rustle-shaped grooves, and a plurality of inclined surfaces extending in the axial direction at corners of the permanent magnet adjacent to the groove formed in the frame, the corners facing the stator. A recess having a wedge-shaped cross section, a wedge-shaped groove insertion portion that is inserted into the groove of the frame from an axial end portion, and a pressing portion that integrally presses the recess having a wedge-shaped cross section of the permanent magnet are integrally formed. A plurality of fixing members for fixing each of the permanent magnets to the frame, and a drive device for a rail vehicle. 2. The railway vehicle drive device according to claim 1, wherein an inclined surface angle of the concave portion having a wedge-shaped cross section of the permanent magnet is set in a range of 75 degrees to 105 degrees. 3. An axle supported by a shaft frame on which a vehicle body is mounted by a shaft spring and arranged in a direction orthogonal to the traveling direction, and rotatably supported at both ends of the axle, and on the floor surface. At least two wheels that can roll on the laid rail, a stator of the outer rotor type electric motor fixed to the axle, and an outer peripheral side of the stator, and the one end is rotatably supported on the axle. A frame having a cylindrical body portion and the other end portion fixed to the side surface in the axial direction of the wheel, and a plurality of frames arranged and fixed at a predetermined interval on the cylindrical inner peripheral surface of the frame. In a railway vehicle drive device including a rotor of an outer rotor type electric motor composed of rectangular permanent magnets, a cylindrical inner peripheral surface of the frame is formed in a gap portion between the permanent magnets, and a shaft. At least two cross sections extending in the same direction A plurality of rustle-shaped grooves, and a plurality of inclined surfaces extending in the axial direction at corners of the permanent magnet adjacent to the groove formed in the frame, the corners facing the stator. A recess having a wedge-shaped cross section, a wedge-shaped groove insertion portion that is inserted into the groove of the frame from an axial end portion, and a pressing portion that integrally presses the recess having a wedge-shaped cross section of the permanent magnet are integrally formed. , A plurality of fixing members for fixing each of the permanent magnets to the frame, and a semi-cure prepreg sheet made of glass fiber containing a resin is inserted into each of the fixing members and the gap between the wedge-shaped grooves of the frame. A drive device for a railway vehicle, characterized in that a boundary surface between the permanent magnet and the pressing member is integrated by curing the resin. 4. The pore according to claim 1, wherein the fixing member is provided with pores for communicating cooling air from the axial end of the fixing member to the end thereof. Railway vehicle drive unit. 5. An axle, which is supported by a shaft frame on which a vehicle body is mounted by a shaft spring and is arranged in a direction orthogonal to the traveling direction, and rotatably supported by both ends of the axle, and which is attached to a floor surface. At least two wheels that can roll on the laid rail, a stator of the outer rotor type electric motor fixed to the axle, and an outer peripheral side of the stator, and the one end is rotatably supported on the axle. A frame having a cylindrical body portion and the other end portion fixed to the side surface in the axial direction of the wheel, and a plurality of frames arranged and fixed at a predetermined interval on the cylindrical inner peripheral surface of the frame. In a railway vehicle drive device including a rotor of an outer rotor type electric motor composed of a rectangular permanent magnet, an inverted triangular shape having a role of fixedly mounting the guide guides of the plurality of permanent magnets and the plurality of permanent magnets. Protrusion integrated with the frame It is obtained by forming an inclined surface extending in the axial direction at each corner of the permanent magnet adjacent to the inverted triangular protrusion formed on the frame and facing the stator. A railway vehicle drive device comprising: a plurality of recesses having a wedge-shaped cross section.