JPH09301169A - Gauge variable truck for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gauge variable truck in which a wheel and a wheel bearing can be easily replaced at the time of maintenance. SOLUTION: In a gauge variable truck 100, an inner ring of a wheel bearing for rotatably supporting a wheel 41 is fitted to a wheel fitting surface 33 of an axle outer cylinder 30 in such a manner as to freely slide, and clamped by a ring nut 46 and a projecting part 32 of the axle outer cylinder 30 to be fixed undisplaceably in the axial direction. A motor frame and a web of the wheel 41 are integrally screw-fitted. Thus, after the axle outer cylinder 30 is removed from a fixed axle 24, the ring nut 46 is removed, and if the motor frame and the wheel 41 are separated, the wheel 41 and the wheel bearing can be easily removed from the axle outer cylinder 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable gauge railcar for a railroad vehicle, which can change the wheel spacing in order to travel on rails having different gauge dimensions such as a bullet train and a conventional line.

[0002]

2. Description of the Related Art Conventionally, for example, a wide gauge having a gauge of 1435 mm used for a bullet train or the like and a narrow gauge having a gauge of 1067 mm used for a conventional line can be driven by the same vehicle. Various trolleys have been proposed. Among such trolleys with variable gauge, there is a drive trolley using a so-called direct drive motor (hereinafter abbreviated as DD motor) in which wheels are directly driven to rotate by a driving electric motor.

The structure around the DD motor of this drive cart is
As an example of the drive carriage described in Japanese Patent Application Laid-Open No. 7-9993, filed by the applicants of the present application, FIG.
As shown in FIG. 2, a small diameter portion 2 a of a stepped columnar fixed axle 2 is held on an axle box 1 suspended from a side beam of a bogie frame (not shown) of a drive truck. In addition, the large diameter portion 2 of the fixed axle 2
A cylindrical axle outer cylinder 3 is fitted in b so as to be slidable in the axial direction of the fixed axle 2. On the other hand, an inner ring 5a of a wheel bearing 5 that rotatably supports a wheel 4 and a stator 7 of a DD motor 6 that directly rotationally drives the wheel 4 are fixed to the outer cylinder 3 of the axle. Further, the cylindrical electric motor frame 8 of the DD motor 6 has its right end in the drawing screwed onto the web 4a of the wheel 4, and its left end in the drawing is supported by the axle outer cylinder 3 via a motor bearing 9. Has been done. And the DD motor 6
The rotor 10 is disposed on the inner peripheral surface of the electric motor frame 8 so as to face the stator 7.

Then, the axle outer cylinder 3 is displaced toward the axle box 1 side,
When the end surface 3a is locked in contact with the axle box 1, it becomes a wide gauge compatible state, and the axle outer cylinder 3 is displaced to the side opposite to the axle box 1, and the end surface 3b is the center of the fixed axle 2 in the longitudinal direction. When locked in a state of abutting on the protruding portion 2c protruding from the portion, the narrow gauge corresponding state is established.

On the other hand, a blower (not shown) is connected to an annular air duct 11 attached to the end of the axle outer cylinder 3 on the side opposite to the axle box 1. Then, after the cooling air supplied from this blower flows into the DD motor 6,
The cooling air is discharged from the cooling air discharge port 8a formed in the electric motor frame 8 to cool the DD motor 6.

[0006]

By the way, when performing maintenance on the drive carriage, it is necessary to easily replace the wear parts such as wheels and bearings. However, the drive cart described above has a structure in which the wheel bearing 5 cannot be separated from the axle outer cylinder 3 unless the DD motor 6 is completely disassembled after the axle outer cylinder 3 is pulled out from the fixed axle 2.

In order to increase the speed of railway vehicles, DD
Although it is necessary to increase the size of the motor, an increase in the diameter conflicts with the vehicle limit, so the width must be increased in the axial direction of the fixed axle. Further, it is necessary to increase the cooling air volume as the DD motor becomes larger. However, in the above-mentioned drive cart, the DD motor 6 is used when traveling on a narrow gauge.
Since the space between them is narrowed, the air duct 11 cannot be enlarged, and it is difficult to secure the cooling air volume.

Further, in the above-described drive cart, the axle outer cylinder 3 slides on the fixed axle 2. However, if dust adheres to the exposed portion of the fixed axle 2, the axle outer cylinder 3 is prevented from sliding. The wear of the fixed axle 2 is accelerated. Therefore, it is conceivable to attach a cover to the fixed axle 2, but simply attaching the cover to the fixed axle 2 hinders the size increase of the pair of DD motors 6.

Therefore, an object of the present invention is to solve the problems of the prior art, to easily replace the wheels and bearings at the time of maintenance, and to cool the air flow rate without hindering the increase in size of the DD motor. Can be secured,
Another object of the present invention is to provide a railroad track variable gauge carriage that can protect the fixed axle from being exposed.

[0010]

In the variable gauge carriage for a railway vehicle according to claim 1 of the present invention, the inner ring of the wheel bearing is slidably fitted from the axle box side to the outer peripheral surface of the axle outer cylinder. ,
Moreover, the stator of the drive motor is slidably fitted to the outer peripheral surface of the axle outer cylinder from the side opposite to the axle box. Further, the inner ring of the wheel bearing and the stator of the driving electric motor are fixed to the outer cylinder of the axle by fixing means and cannot be displaced in the axial direction of the outer cylinder of the axle. Further, the rotor of the driving electric motor is screwed to the wheel via the electric motor frame. Therefore, if the axle outer cylinder is pulled out from the fixed axle, the motor frame of the drive motor and the wheels are separated, and the fixing means releases the fixation of the wheel bearing inner ring to the axle outer cylinder, the drive motor is disassembled. It is possible to remove the wheel from the axle casing together with the wheel bearing without the need. Similarly, if the fixing of the stator to the outer casing of the axle by the fixing means is released, the stator can be easily separated from the wheel bearing.

On the other hand, in the variable gauge truck for a railway vehicle according to claim 3 of the present invention, the cover and the pair of left and right partition walls form an air duct. Then, the cooling air supplied from the blower into the air duct enters the pair of left and right driving electric motors to cool the driving electric motors. At this time, since the tubular cover is arranged so as to expand and contract along the outer peripheral surface of the driving electric motor, as in the case where the cover is arranged between the pair of left and right driving electric motors, There is no hindrance to the upsizing of the air conditioner or it is not possible to secure a sufficient space for blowing the cooling air. Further, the cover covers and protects the fixed axle exposed between the pair of left and right axle outer cylinders.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a variable gauge carriage for a railway vehicle according to the present invention will be described in detail below with reference to FIGS. 1 to 6.

As shown in FIG. 1 and FIG. 2, in the railcar variable gauge bogie 100 of this embodiment, four shafts are respectively provided on the left and right side beams 21 of the bogie frame 20 via shaft springs 22. Box 23 is suspended. Two cylindrical fixed axles 24 are installed between these axle boxes 23.

As shown in FIG. 3, a pair of left and right symmetrical axle outer cylinders 30 are slidably fitted on the fixed axle 24. The end 31 of the axle outer cylinder 30 on the axle box 23 side
A spline 31a is formed on the outer peripheral surface of the. When the spline 31a engages with the axle box 23, the axle outer cylinder 30 does not rotate and the fixed axle 24 does not rotate.
Can slide on top. In addition, a pair of through holes 31b and 31c are arranged in the end portion 31 of the axle outer cylinder 30 at intervals in the axial direction. Then, when the pin 26 of the lock means 25 attached to the axle box 23 engages with either of the through holes 31b, 31c, the axle outer cylinder 30.
Is fixed so as not to be displaced in the axial direction of the fixed axle 24.

A projecting portion 32 that extends over the entire circumference in the circumferential direction is provided at the central portion in the longitudinal direction of the axle outer cylinder 30. A cylindrical wheel mounting surface 33 having an outer diameter larger than the outer diameter of the spline 31a but smaller than the outer diameter of the spline 31a is provided in a portion between the protruding portion 32 and the spline 31a. Has been formed. Further, a columnar electric motor mounting surface 34 is formed at a portion opposite to the wheel mounting surface 33 with the protruding portion 32 interposed therebetween.

On the other hand, the boss 41a provided at the center of the wheel 41 is provided with a bearing mounting hole 41b. Then, the wheel bearing 42 fitted inside the bearing mounting hole 41b.
Is an annular retainer 43 screwed to the side surface of the boss 41a.
Has been prevented by. The inner diameter of the inner ring 42a of the wheel bearing 42 is equal to the wheel mounting surface 3 of the fixed axle 24.
It is set slightly larger than the outer diameter of 3. Thereby, the wheel assembly 40 in which the wheel 41 and the wheel bearing 42 are integrally assembled can be slidably fitted to the wheel mounting surface 33 of the fixed axle 24.

The wheel assembly 40 fitted to the wheel mounting surface 33 of the axle outer cylinder 30 includes a cylindrical spacer 45 fitted to the wheel mounting surface 33 and an end of the wheel mounting surface 33 on the axle box 23 side. Ring nut 4 that is screwed into the male screw 33a formed on the
6 presses toward the protruding portion 32 of the axle outer cylinder 30 and is fixed so as not to be displaced in the axial direction.

An oil seal 43a, which is in sliding contact with the outer peripheral surface of the spacer 45, is attached to the retainer 43. An annular retainer 44 is screwed to the side surface on the opposite side of the wheel boss 41a. An oil seal 44a that is in sliding contact with the outer peripheral surface of the protruding portion 32 of the axle outer cylinder 30 is attached to the retainer 44. As a result, the wheel bearing 42 is attached to the pair of oil seals 4
Protected by 3a and 44a, lubrication is maintained and dust is prevented from entering.

On the other hand, the stator 51 of the driving motor 50 is slidably fitted to the motor mounting surface 34 of the axle outer cylinder 30 while being sandwiched by the spacer 52 and the bearing support member 53. . Then, a ring nut 54 screwed to the male screw 34a screwed on the end of the electric motor mounting surface 34.
However, the spacer 52, the bearing support member 53, and the stator 51 are sandwiched and fixed together with the protruding portion 32 of the axle outer cylinder 30. Further, the stator 51 is locked to the axle outer cylinder 30 by a key (not shown) so as not to rotate around the axle outer cylinder 30.

A flange 53a is vertically provided at an end of the bearing support member 53 opposite to the stator 51. Then, one end of the cylindrical electric motor frame 56 is rotatably supported by a bearing 55 housed in a housing 53b provided at the tip of the flange 53a. The other end of the electric motor frame 56 is screwed to the web 41c of the wheel 41 so as to rotate integrally with the wheel 41. Further, a rotor 57 is attached to the inner peripheral surface of the electric motor frame 56 so as to face the stator 51. Further, an annular rotor 58 of a disc brake is attached to the outer peripheral surface of the electric motor frame 56.

Next, a procedure for removing the wheel assembly 40 and the driving electric motor 50 from the axle outer cylinder 30 at the time of maintenance of the variable gauge carriage 100 of the present embodiment assembled as described above will be described.

First, after removing the fixed axle 24 from the axle box 23, the axle outer cylinder 30 in which the wheel assembly 40 and the drive motor 50 are assembled is pulled out from the fixed axle 24. Next, the axle outer cylinder 30 is fixed, and the screwing of the electric motor frame 56 and the wheel 41 is released while the electric motor frame 56 of the driving electric motor 50 is supported. Further, when the ring nut 46 that fixes the wheel assembly 40 is loosened, the inner ring 42a of the wheel bearing 42 is slidably fitted to the wheel mounting surface 33 as described above.
The wheel assembly 40 can be easily removed from the axle outer cylinder 30. Then, by removing the retainers 43 and 44 attached to both side surfaces of the wheel boss 41a, the wheel bearing 42 can be easily removed from the wheel 41.

As described above, the wheel assembly 40 is attached to the axle outer cylinder 3
Drive motor 50 after removing from 0,
To remove from the first, the motor frame 56 to the bearing 55
Remove the snap ring (not shown) that locks. Then, when the ring nut 54 is loosened, as described above, the bearing support member 532, the stator 51 and the spacer 52.
Is slidably mounted on the motor mounting surface 34 of the axle outer cylinder 30, these components can be easily removed from the axle outer cylinder 30.

That is, the variable gauge carriage 10 of the present embodiment.
At 0, the inner ring 42a of the wheel bearing 42 is the outer cylinder 3 of the axle.
It is slidably fitted to the wheel mounting surface 33 of No. 0, is fixed to the axle outer cylinder 30 by tightening the ring nut 46, and the wheel 41 and the electric motor frame 56 are screwed. As a result, the wheel assembly 40 can be easily removed from the axle outer cylinder 30 without disassembling the drive motor 50, so that the wheels 41 and the wheel bearings 42 can be easily replaced during maintenance. Further, an oil seal 43 for sealing the wheel bearing 42
Since a and 44a can also be removed integrally with the wheel assembly 40, these parts can be easily replaced.

Next, the cooling structure of the drive motor 50 in the variable gauge carriage 100 of this embodiment will be described. As shown in FIG. 3, the air duct A for supplying cooling air into the drive motor 50 is First and second partition wall 6
It is formed by 0 and 70 and a bellows-shaped cover 80.

The first partition wall 60 is formed in an annular shape by pressing a steel plate, and the inner portion 61 in the radial direction thereof has a plate shape extending perpendicularly to the axis of the drive motor 50. And is attached to the bearing housing 53b on the right side of the drawing, and the motor frame 56
Is disposed close to the end of the. Further, the outer peripheral portion 62 is formed in a U-shaped cross-sectional shape that opens toward the driving electric motor 50 on the left side in the drawing, and is located radially outside with respect to the outer peripheral surface 56a of the driving electric motor 50 on the right side in the drawing. It is arranged as follows. Further, at the tip of the outer peripheral portion 62, when the pair of left and right driving electric motors 50 approach each other in a narrow gauge compatible state as shown in FIG. 4, the cover 80 is pressed into the inside of the second partition wall 70. A pressing plate 63 is attached. Further, as shown in FIG. 2, in the opening 65 formed in the outer peripheral portion 62,
As shown in FIG. 1, a blower 66 is attached via a bellows 67.

Similarly, the bearing housing 52b on the left side of the drawing is shown.
A second partition wall 70 formed into an annular shape by pressing a steel plate is attached to the. A portion 71 of the second partition wall 70 on the radially inner side is a driving motor 50.
It has a plate-like shape extending perpendicularly to the axis of, and is arranged close to the end of the electric motor frame 56. The radially outer portion 72 of the second partition wall 70 is formed into a U-shaped cross-section that opens toward the driving electric motor 50 on the right side in the drawing, and the outer peripheral surface 56 a of the electric motor frame 56.
Is arranged so as to be located on the outer side in the radial direction.

As shown in FIG. 3, the first and second
A cylindrical cover 80 coaxial with the driving electric motor 50 is installed between the partition walls 60 and 70. The inner diameter of the cover 80 is larger than the outer diameter of the electric motor frame 56, and the cover 80 is folded in a bellows shape so that it can be expanded and contracted along the outer peripheral surface of the drive electric motor frame 56. Both ends of the cover 80 are fixed to the first and second partition walls 60 and 70 over the entire circumference, respectively, and form the air duct A together with the first and second partition walls 60 and 70.

On the other hand, as shown in FIG. 3, a cover suspension 90 is installed between the upper ends of the first and second partition walls 60 and 70. The cover suspension device 90 has a cylindrical rod member 91 having a base end portion fixed to the upper end of the first partition wall 60, and a base end portion fixed to the upper end of the second partition wall 70, and the rod member 91. A cylinder 92 slidably fitted on the outside, and a plurality of circular rings 9 fitted to the rods 91 and the cylinder 92.
3 and a plurality of connecting members 94 attached to these circular rings 93, respectively. Then, by attaching these connecting members 94 to the apexes of the bellows of the cover 80, the cover 80 is suspended by the cover suspension device 90 and is supported so as not to hang down due to its own weight.

That is, the variable gauge carriage 10 of the present embodiment.
At 0, the cooling air supplied from the blower 66 is the air duct A formed by the first and second partition walls 60 and 70 and the cover 80, and the through hole 53c formed in the flange 53a of the bearing support member 53. After being blown into the inside of the pair of left and right drive electric motors 50 via, and is discharged to the outside through an opening 56a formed in the electric motor frame 56, the drive electric motors 50 are cooled.

At this time, the first supporting the cylindrical cover 80
And a radially inner portion 61 of the second partition 60, 70,
71 is formed in a plate shape that extends perpendicularly to the axis of the driving electric motor 50, and is arranged close to the end of the electric motor frame. Accordingly, almost all of the gap between the pair of left and right driving electric motors 50 can be utilized as the space of the air duct A, so that even if the pair of left and right driving electric motors 50 approach each other in a narrow gauge compatible state. A sufficient amount of cooling air for cooling the drive motor 50 can be secured. Further, even when the axial width of the driving electric motor 50 is widened in order to increase the size of the driving electric motor 50, the air duct A does not interfere.

Further, the first and second partition walls 60, 70
Since the air duct A formed by the cover 80 and the cover 80 covers and protects the fixed axle 24 exposed between the pair of left and right axle outer cylinders 30, dust or rust may occur on the surface of the fixed axle 24. Therefore, the sliding of the axle outer cylinder 30 is not hindered.

It is needless to say that the railroad variable gauge carriage of the present invention is not limited to the above-described embodiment, and various modifications can be made based on the gist of the present invention. For example, in the above-described embodiment, the cover 80 is installed between the first partition wall 60 and the second partition wall 70. On the other hand, FIG. 5 and FIG.
As shown in FIG. 5, the first partition wall 110 is attached to the protruding portion 24a provided on the outer peripheral surface of the fixed axle shaft 24, and the second partition wall 120 and the third partition wall 130 are respectively mounted on the pair of left and right axle outer cylinders 30. Installation, and further the first partition wall 11
If a pair of left and right covers 140 and 150 are installed between 0 and the second and third partition walls 120 and 130, respectively, the axial lengths of the covers 140 and 150 can be shortened. The cover suspension 90 as shown in FIGS. 3 and 4 can be dispensed with.

[0034]

As is apparent from the above description, according to the variable gauge truck for a railroad vehicle of the present invention, the wheel assembly can be removed from the axle outer cylinder without disassembling the drive motor, so that maintenance is possible. In this case, not only the wheels, wheel bearings, oil seals, etc. can be replaced very easily, but also the assembly can be carried out easily. Further, in the railcar variable bogie of the present invention, the air ducts for supplying the cooling air to the driving electric motor are attached to the pair of left and right axle outer cylinders, respectively, and the outer wall of the driving electric motor. And a cylindrical cover having an inner diameter larger than the diameter. As a result, almost all of the gap between the pair of left and right drive motors can be used as a space for the air duct, and not only can a sufficient amount of cooling air to cool the drive motors be secured, but also the drive motors can be driven. Even when the axial length of the drive motor is extended due to the increase in size of the drive motor, there is no obstacle. Further, the air duct formed by the first and second partition walls and the cover covers and protects the fixed axle exposed between the pair of left and right axle outer cylinders, so that dust or rust may be attached to the surface of the fixed axle. Does not interfere with the sliding of the outer cylinder of the axle.

[Brief description of drawings]

FIG. 1 is an overall side view of a variable gauge carriage according to a first embodiment of the present invention.

FIG. 2 is an overall plan view of the variable gauge carriage shown in FIG.

FIG. 3 is a vertical cross-sectional view of the axle taken along the line III-III in FIG.

FIG. 4 is a vertical cross-sectional view of the axle taken along the line IV-IV shown in FIG.

FIG. 5 is a longitudinal sectional view of an axle of a variable gauge carriage according to another embodiment of the present invention.

FIG. 6 is a vertical sectional view of an axle of a variable gauge truck according to another embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of an axle of a drive carriage described in Japanese Patent Laid-Open No. 7-9993.

[Explanation of symbols]

 20 Bogie Frame 21 Side Beam 23 Axle Box 24 Fixed Axle 30 Axle Outer Cylinder 31 End 32 Protrusion 33 Wheel Mounting Surface 34 Electric Motor Mounting Surface 40 Wheel Assembly 41 Wheel 42 Wheel Bearing 43, 44 Retainer 45 Spacer 46 Ring Nut 50 Drive Electric motor 51 Stator 52 Spacer 53 Bearing support member 54 Ring nut 55 Bearing 56 Motor frame 57 Rotor 60 First partition wall 65 Opening 66 Blower 67 Bellows 70 Second partition wall 80 Cover 90 Cover suspension device 100 One embodiment according to the present invention Variable track gauge 110 of a form 110 First partition wall 120 Second partition wall 130 Third partition wall 140 Cover 150 Cover 200 Variable track gauge carriage of another embodiment

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masakatsu Sakai 2-14-2 Nagata-cho, Chiyoda-ku, Tokyo Nihon Railway Construction Public Corps (72) Inventor Koichi Matsuoka 2-chome, Kokubunji, Kokubunji, Tokyo 8th 38 Inside the Railway Technical Research Institute (72) Inventor Ken Tokuda Akatsuki 2-8, Hikaricho, Kokubunji, Tokyo 38 38 The National Railway Technical Research Institute (72) Nobuyuki Yagi Tokyo Fuchu City Toshiba Town No. 1 at Fuchu Factory, Toshiba Corp. (72) Inventor Yukio Minowa 1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Within Fuji Heavy Industries Ltd.

Claims (4)

[Claims] 1. A fixed axle that is installed between a pair of axle boxes that are respectively suspended on the left and right side beams of a bogie frame, and a position that is supported by each of the fixed axles and that corresponds to a wide gauge and a narrow gauge. And a pair of left and right axle outer cylinders that are displaceable in the axial direction of the fixed axle between these positions and a pair of left and right wheels that are rotatably attached to these axle outer cylinders via wheel bearings, respectively. A pair of left and right driving electric motors, which are attached to the pair of axle outer cylinders between the pair of wheels, respectively, and directly rotate the pair of wheels, respectively, and an inner ring of the wheel bearing is provided from the axle box side. The stator of the drive motor is slidably fitted on the outer peripheral surface of the axle outer cylinder, and the stator of the drive motor is slidably mounted on the outer peripheral surface of the axle outer cylinder from the side opposite to the axle box. It is possible to be fitted and before The inner ring and the stator are fixed to the outer casing of the axle by fixing means so that they cannot be displaced in the axial direction of the outer casing of the axle, and the rotor of the driving electric motor is screwed to the wheel via the electric motor frame. A variable-gauge trolley for railway vehicles, which is characterized by being worn. 2. The fixing means includes a protrusion protruding from the outer peripheral surface of the axle outer cylinder, and a pair of left and right male screws screwed to the outer peripheral surface of the axle outer cylinder on both left and right sides of the protrusion. ,
The railcar variable gauge for railcars according to claim 1, further comprising a pair of left and right ring nuts that are screwed to these male screws and sandwich the inner ring and the stator together with the protrusion. 3. A fixed axle installed between a pair of axle boxes suspended on left and right side beams of a bogie frame, and a position supported by the fixed axle and corresponding to a wide gauge and a narrow gauge. And a pair of left and right axle outer cylinders that are displaceable in the axial direction of the fixed axle between these positions and a pair of left and right wheels that are rotatably attached to these axle outer cylinders via wheel bearings, respectively. A pair of left and right drive motors that are respectively mounted between the pair of wheels on the pair of axle outer cylinders and that directly drive the pair of wheels, respectively, and a larger outer diameter than the outer peripheral surface of these drive motors. A cover having a cylindrical shape having an inner diameter and capable of expanding and contracting along the outer peripheral surface of the driving electric motor, and being supported by the axle outer cylinder between the pair of driving electric motors, respectively. A pair of left and right partition walls, each of which has end portions fixed to each other over the entire circumference and which together with the cover forms an air duct for supplying cooling air into the pair of left and right driving electric motors; and a blower for supplying cooling air into the air duct. A gauge-adjustable bogie for railroad vehicles, comprising: 4. A railcar variable gauge truck according to claim 3, wherein the cover is suspended by a stretchable suspension member that is provided between the pair of left and right partition walls.